{"id":6082,"date":"2010-11-07T06:21:28","date_gmt":"2010-11-07T11:21:28","guid":{"rendered":"http:\/\/www.olino.org\/us\/?p=6082"},"modified":"2010-12-21T08:37:11","modified_gmt":"2010-12-21T13:37:11","slug":"jacs-koopman-interlight-ar111-with-gu10-fitting-il_11x1225p4ld","status":"publish","type":"post","link":"https:\/\/olino.org\/blog\/us\/articles\/2010\/11\/07\/jacs-koopman-interlight-ar111-with-gu10-fitting-il_11x1225p4ld\/","title":{"rendered":"Jac&#8217;s Koopman &#8211; INTERlight AR111 with GU10 fitting IL_11X1225P4LD"},"content":{"rendered":"<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD.jpg\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignright size-thumbnail wp-image-19986\" title=\"IL_11x1225P4LD\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD-96x100.jpg\" alt=\"\" width=\"96\" height=\"100\" \/><\/a> <a href=\"http:\/\/www.olino.org\/us\/jacs-koopman.nl\" target=\"_blank\">Jac&#8217;s Koopman<\/a> presents an AR111 led lamp with GU10 fitting. The lamp contains 7 leds emitting a warm white light. This lamp is dimmable.<\/p>\n<p>This article shows the measurement results. Many parameters are also found in the <a href=\"http:\/\/www.helios32.com\/Eulumdat.htm\" target=\"_blank\">Eulumdat file<\/a>.<\/p>\n<p>See <a href=\"\/us\/articles\/2008\/09\/21\/overview-lamp-measurements\" target=\"_self\">this overview<\/a> for a comparison with other light bulbs.<\/p>\n<p><!--more--><\/p>\n<h3>Summary measurement data<\/h3>\n<table border=\"0\">\n<tbody>\n<tr>\n<th>parameter<\/th>\n<th>meas. result<\/th>\n<th>remark<\/th>\n<\/tr>\n<tr>\n<td><a href=\"#kleurtemperatuur\">Color temperature<\/a><\/td>\n<td>2705 K<\/td>\n<td>Warm white<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#lichtsterkte\">Luminous intensity I<sub>v<\/sub><\/a><\/td>\n<td>1861 Cd<\/td>\n<td>Measured straight underneath the lamp.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#modulationindex\">Illuminance modulation index<\/a><\/td>\n<td>48 %<\/td>\n<td>Measured straight underneath the lamp. Is a measure for the amount of flickering.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#stralingshoek\">Beam angle<\/a><\/td>\n<td>28 deg<\/td>\n<td>28\u00ba for all <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#light_diagram\" target=\"_blank\">C-planes<\/a> since the lamp is symmetrical along its 1st axis.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.olino.org\/us\/wp-admin\/#electrical\" target=\"_self\">Power P<\/a><\/td>\n<td>11.0 W<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#powerfactor\" target=\"_blank\">Power Factor<\/a><\/td>\n<td>0.93<\/td>\n<td>For every 1 kWh net power consumed, there has been 0.4 kVAhr for reactive power.<\/td>\n<\/tr>\n<tr>\n<td>THD<\/td>\n<td>25 %<\/td>\n<td>Total Harmonic Distortion<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#lichtstroom\">Luminous flux<\/a><\/td>\n<td>471 Lm<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"#efficientie\">Luminous efficacy<\/a><\/td>\n<td>43 Lm\/W<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td><a href=\"#EUlabel\">EU-label classification<\/a><\/td>\n<td>B<\/td>\n<td>The energy class, from A (more efficient) to G (least efficient).<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#cri\">CRI_Ra<\/a><\/td>\n<td>83<\/td>\n<td><a href=\"http:\/\/en.wikipedia.org\/wiki\/Color_rendering_index\" target=\"_blank\">Color Rendering Index<\/a>.<\/td>\n<\/tr>\n<tr>\n<td>Coordinates <a href=\"#kleursoort\">chromaticity diagram<\/a><\/td>\n<td>x=0.4566 and y=0.4049<\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Fitting<\/td>\n<td><a href=\"http:\/\/en.wikipedia.org\/wiki\/Bayonet_mount\" target=\"_blank\">GU10<\/a><\/td>\n<td>This lamp is connected to the 230 V grid voltage.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#PAR\">PAR-value<\/a><\/td>\n<td>18.7 \u03bcMol\/s\/m<sup>2<\/sup><\/td>\n<td>The number of photons seen by an average plant when it is lit by the light of this light bulb. Value valid at 1 m distance from light bulb.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#PAR\">PAR-photon efficacy<\/a><\/td>\n<td>0.4 \u03bcMol\/s\/W<sub>e<\/sub><\/td>\n<td>The toal emitted number of photons by this light, divided by its consumption in W. It indicates a kind of efficacy in generating photons.<\/td>\n<\/tr>\n<tr>\n<td><a href=\"#S\/P-ratio\">S\/P ratio<\/a><\/td>\n<td>1.2<\/td>\n<td>This factor indicates the amount of times more efficient the light of this light bulb is perceived under scotopic circumstances (low environmental light level).<\/td>\n<\/tr>\n<tr>\n<td>D x H external dimensions<\/td>\n<td>110 x 70 mm<\/td>\n<td>External dimensions of the lamp.<\/td>\n<\/tr>\n<tr>\n<td>D luminous area<\/td>\n<td>34 mm<\/td>\n<td>Dimensions of the luminous area (used in Eulumdat file). This is the surface of the smallest circle around the leds at the front of the lamp.<\/td>\n<\/tr>\n<tr>\n<td>General remarks<\/td>\n<td><\/td>\n<td>The ambient temperature during the whole set of illuminance measurements was 23.3-25.3 deg C.<\/p>\n<p>The temperature of the housing gets maximally <a href=\"#T_metingen\" target=\"_self\">about 36 degrees hotter<\/a> than ambient temperature.<br \/>\n<a href=\"#heatup-effect\"><\/a><\/p>\n<p><a href=\"#heatup-effect\">Warm up effect<\/a>: during the warm up time the illuminance decreases with 9 % and the consumed power with 7 %.<\/p>\n<p><a href=\"#spanningsafhankelijkheid\">Voltage dependency<\/a>: the power consumption and illuminance vary when the power voltage varies between 200-250 V. This is understandable as the lamp is dimmable.<\/p>\n<p>This lamp has been tested on <a href=\"#dimbaar\">dim-ability<\/a> and it is. The result varies depending on the dimmer type used.<\/p>\n<p>At the end of the article there is an <a href=\"#foto\">additional photo<\/a>.<\/td>\n<\/tr>\n<tr>\n<td>Measurement report (PDF)<\/td>\n<td><a href=\"http:\/\/www.olino.org\/us\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_ENG.pdf\"><img decoding=\"async\" loading=\"lazy\" title=\"olino-pdf\" src=\"http:\/\/www.olino.org\/us\/wp-content\/uploads\/2009\/01\/olino-pdf.jpg\" alt=\"olino-pdf\" width=\"43\" height=\"60\" \/><\/a><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<td>Eulumdat file<\/td>\n<td><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_eulumdat.ldt\" target=\"_blank\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-1887\" title=\"olino_eulumdat\" src=\"http:\/\/www.olino.org\/us\/wp-content\/uploads\/2009\/05\/olino_eulumdat.png\" alt=\"olino_eulumdat\" width=\"70\" height=\"52\" \/><\/a><\/td>\n<td>Right click on icon and save the file.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>Overview table<\/h3>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_summary2.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19989\" title=\"IL_11x1225P4LD_summary2\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_summary2-400x135.png\" alt=\"\" width=\"400\" height=\"135\" \/><\/a><\/p>\n<p>The <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#summary_table\" target=\"_blank\">overview table<\/a> is explained on the OliNo website.<\/p>\n<p>Please note that this overview table makes use of calculations, use this data with care as explained on the OliNo site. E (lux) values are not accurate, when within 5 x 34 mm \u2248 175 mm. Within this distance from the lamp, the measured lux values willl be less than the computed values in this overview as the measurements are then within the near field of the lamp.<\/p>\n<h3><a name=\"EUlabel\">EU Energy label classfication<\/a><\/h3>\n<p>With the measurement results of the luminous flux and the consumed power the classification on energy of this lamp is calculated. This information is requested in the EU for certain household lamps, see also the  <a href=\"http:\/\/www.olino.org\/us\/articles\/2010\/10\/12\/eu-energy-label-for-lamps\" target=\"_blank\">OliNo site<\/a> that explains for which lamps it is requested, how the label looks like and what information it needs to contain.<\/p>\n<p>Herewith the labels for this lamp in color and black and white.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_EU_label_color.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19990\" title=\"IL_11x1225P4LD_EU_label_color\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_EU_label_color-208x400.png\" alt=\"\" width=\"208\" height=\"400\" \/><\/a><\/p>\n<p><em>EU energy label of this lamp<\/em><\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_EU_label_bw.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-thumbnail wp-image-19991\" title=\"IL_11x1225P4LD_EU_label_bw\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_EU_label_bw-52x100.png\" alt=\"\" width=\"52\" height=\"100\" \/><\/a><\/p>\n<p><em>Label in black and white.<\/em><\/p>\n<h3><a name=\"lichtsterkte\"><\/a>Eulumdat light diagram<\/h3>\n<p>This light diagram below comes from the program <a href=\"http:\/\/sourceforge.net\/projects\/qlumedit\" target=\"_blank\">Qlumedit<\/a>, that extracts these diagrams from an <a href=\"http:\/\/www.helios32.com\/Eulumdat.htm\">Eulumdat<\/a> file. <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#light_diagram\" target=\"_blank\">It is explained<\/a> on the OliNo site.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_light_diagram.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19992\" title=\"IL_11x1225P4LD_light_diagram\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_light_diagram-399x204.png\" alt=\"\" width=\"399\" height=\"204\" \/><\/a><\/p>\n<p><em>The light diagram giving the radiation pattern.<\/em><\/p>\n<p>It indicates the luminous intensity around the light bulb. All the planes give the same results as the lamp is symmetrical along its 1st axis.<\/p>\n<h3>Illuminance Ev at 1 m distance, or luminous intensity Iv<\/h3>\n<p>Herewith the plot of the <em>averaged<\/em> luminous intensity Iv as a function of the inclination angle with the light bulb.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_PP_avg.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19993\" title=\"IL_11x1225P4LD_PP_avg\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_PP_avg-400x209.png\" alt=\"\" width=\"400\" height=\"209\" \/><\/a><\/p>\n<p><em>The <a href=\"http:\/\/en.wikipedia.org\/wiki\/Radiation_pattern\" target=\"_blank\">radiation pattern<\/a> of the light bulb.<\/em><\/p>\n<p>This radiation pattern is the average of the light output of the light diagram given earlier. Also, in this graph the luminous intensity is given in Cd.<\/p>\n<p>These averaged values are used (later) to compute the lumen output.<\/p>\n<p><a name=\"stralingshoek\"><\/a><\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_Ev_dep_kantelhoek.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19994\" title=\"IL_11x1225P4LD_Ev_dep_kantelhoek\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_Ev_dep_kantelhoek-400x211.png\" alt=\"\" width=\"400\" height=\"211\" \/><\/a><\/p>\n<p><em>Intensity data of every measured turn angle at each inclination angle.<\/em><\/p>\n<p>This plot shows per inclination angle the intensity measurement results for each turn angle at that inclination angle. There normally are differences in illuminance values for different turn angles. However for further calculations the averaged values will be used.<\/p>\n<p>When using the average values per inclination angle, the <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#stralingshoek\" target=\"_blank\">beam angle<\/a> can be computed, being 28\u00ba for all C-planes looked at.<\/p>\n<h3><a name=\"lichtstroom\">Luminous flux<\/a><\/h3>\n<p>With the averaged illuminance data at 1 m distance, taken from the graph showing the averaged radiation pattern, it is possible <a href=\"\/us\/articles\/2008\/09\/29\/background-light-measurements#I_v_2_PHI\" target=\"_self\">to compute the luminous flux<\/a>.<\/p>\n<p>The result of this computation for this light spot is a luminous flux of 471 Lm.<\/p>\n<h3><a name=\"efficientie\">Luminous efficacy<\/a><\/h3>\n<p>The luminous flux being 471 Lm, and the power of the light bulb being 11.0 W, yields a luminous efficacy of 43 Lm\/W.<\/p>\n<h3><a name=\"electrical\">Electrical properties<\/a><\/h3>\n<p>A power factor of 0.93 means that for every 1 kWh net power consumed, a reactive component of 0.4 kVAr was needed.<\/p>\n<table border=\"0\">\n<tbody>\n<tr>\n<td>Lamp voltage<\/td>\n<td>230 VAC<\/td>\n<\/tr>\n<tr>\n<td>Lamp current<\/td>\n<td>52 mA<\/td>\n<\/tr>\n<tr>\n<td>Power P<\/td>\n<td>11.0 W<\/td>\n<\/tr>\n<tr>\n<td><a href=\"http:\/\/en.wikipedia.org\/wiki\/AC_power\" target=\"_blank\">Apparent power<\/a> S<\/td>\n<td>11.9 VA<\/td>\n<\/tr>\n<tr>\n<td><a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#powerfactor\" target=\"_blank\">Power factor<\/a><\/td>\n<td>0.93<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Of this light bulb the voltage across ad the resulting current through it are measured and graphed. See <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#powerfactor\" target=\"_blank\">the OliNo site<\/a> how this is obtained.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_U_I_waveforms.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19995\" title=\"IL_11x1225P4LD_U_I_waveforms\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_U_I_waveforms-400x222.png\" alt=\"\" width=\"400\" height=\"222\" \/><\/a><\/p>\n<p><em>Voltage across and current through the lightbulb<\/em><\/p>\n<p>This waveforms have been checked on requirements posed by the norm IEC 61000-3-2:2006 (including up to A2:2009). See also the <a href=\"http:\/\/www.olino.org\/us\/articles\/2010\/01\/02\/background-thd-and-iec-61000-3-22006-results-in-lamp-measurement-articles\" target=\"_blank\">explanation on the OliNo website<\/a>.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_harmonics.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19996\" title=\"IL_11x1225P4LD_harmonics\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_harmonics-400x219.png\" alt=\"\" width=\"400\" height=\"219\" \/><\/a><\/p>\n<p><em>Harmonics in in the current waveform and checked against IEC61000-3-2:2006<\/em><\/p>\n<p>There are no limits for the harmonics for lighting equipment &lt;= 25 W.<\/p>\n<p>The Total Harmonic Distortion of the current is computed as 25 %.<\/p>\n<h3><a name=\"T_metingen\">Temperature measurements lamp<\/a><\/h3>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IR_0802.jpg\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19997\" title=\"IR_0802\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IR_0802-400x300.jpg\" alt=\"\" width=\"400\" height=\"300\" \/><\/a><\/p>\n<p><em>IR image from the front of the lamp<br \/>\n<\/em><\/p>\n<p>The used tape has an emissivity of about 0.95. The metal on the side has a comparable emissivity (same color on this IR photo) and the white material on the base also has a (comparable) high emissivity.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IR_0805.jpg\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19998\" title=\"IR_0805\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IR_0805-400x300.jpg\" alt=\"\" width=\"400\" height=\"300\" \/><\/a><\/p>\n<p><em>The side of the lamp. <\/em><\/p>\n<p>The side of the lamp also has a high emissivity since due to the high difference in temperature of the material compared to ambient, the tape used was hardly visible. This means that the emissivity of the tape is comparable to that of the material of the lamp housing .<\/p>\n<table border=\"0\">\n<tbody>\n<tr>\n<td>status lamp<\/td>\n<td>&gt; 2 hours on<\/td>\n<\/tr>\n<tr>\n<td>ambient temperature<\/td>\n<td>23 deg C<\/td>\n<\/tr>\n<tr>\n<td>reflected background temperature<\/td>\n<td>23 deg C<\/td>\n<\/tr>\n<tr>\n<td>camera<\/td>\n<td>Flir T335<\/td>\n<\/tr>\n<tr>\n<td>emissivity<\/td>\n<td>0.95<sup>(1)<\/sup><\/td>\n<\/tr>\n<tr>\n<td>measurement distance<\/td>\n<td>0.4 m<\/td>\n<\/tr>\n<tr>\n<td>IFOV<sub>geometric<\/sub><\/td>\n<td>0.5 mm<\/td>\n<\/tr>\n<tr>\n<td>NETD (thermal sensitivity)<\/td>\n<td>50 mK<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><sup>(1)<\/sup> See text for explanation.<\/p>\n<h3><a name=\"kleurtemperatuur\">Color temperature and Spectral power distribution<\/a><\/h3>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_powerspectrum_at_1m_distance.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-19999\" title=\"IL_11x1225P4LD_powerspectrum_at_1m_distance\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_powerspectrum_at_1m_distance-400x211.png\" alt=\"\" width=\"400\" height=\"211\" \/><\/a><\/p>\n<p><em>The spectral power distribution of this light bulb, energies on y-axis valid at 1 m distance.<\/em><\/p>\n<p>The measured color temperature is about 2700 K which is warm white.<\/p>\n<p>This color temperature is measured straight underneath the light bulb. Below a graph showing the color temperature for different inclination angles.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_cct_function_of_incl.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20000\" title=\"IL_11x1225P4LD_cct_function_of_incl\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_cct_function_of_incl-400x310.png\" alt=\"\" width=\"400\" height=\"310\" \/><\/a><\/p>\n<p><em>Color temperature as a function of inclination angle.<\/em><\/p>\n<p>The measurement of CCT is measured for inclination angles up to 70\u00ba. Beyond that angle the illuminance was very low (&lt; 5 lux).<\/p>\n<p>The beam angle is 28\u00ba, meaning a 14\u00ba inclination angle. In this area most of the light is present. The variation in correlated color temperature in this area is about 1 %.<\/p>\n<h3><a name=\"PAR\">PAR value and PAR spectrum<\/a><\/h3>\n<p>To make a statement how well the light of this light bulb is for growing plants, the PAR-area needs to be determined. See <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#PAR\" target=\"_blank\">the OliNo website <\/a>how this all is determined and the explanation of the graph.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_PAR_spectra_at_1m_distance.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20001\" title=\"IL_11x1225P4LD_PAR_spectra_at_1m_distance\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_PAR_spectra_at_1m_distance-400x230.png\" alt=\"\" width=\"400\" height=\"230\" \/><\/a><\/p>\n<p><em>The photon spectrum, then the sensitivity curve and as result the final PAR spectrum of the light of this light bulb<\/em><\/p>\n<table border=\"0\">\n<tbody>\n<tr>\n<th>parameter<\/th>\n<th>value<\/th>\n<th>unit<\/th>\n<\/tr>\n<tr>\n<td>PAR-number<\/td>\n<td>18.7<\/td>\n<td>\u03bcMol\/s\/m\u00b2<\/td>\n<\/tr>\n<tr>\n<td>PAR-photon current<\/td>\n<td>4.7<\/td>\n<td>\u03bcMol\/s<\/td>\n<\/tr>\n<tr>\n<td>PAR-photon efficacy<\/td>\n<td>0.4<\/td>\n<td>\u03bcMol\/s\/W<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The PAR efficiency is 65 % (valid for the PAR wave length range of 400 &#8211; 700 nm). So maximally 65 % of the total of photons in the light is effectively used by the average plant (since the plant might not take 100 % of the photons at the frequency where its relative sensitivity is 100 %).<\/p>\n<h3><a name=\"S\/P-ratio\">S\/P ratio<\/a><\/h3>\n<p>The S\/P ratio and measurement is explained <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/10\/29\/background-measurement-data-lamp-measurement-articles#S\/P-ratio\" target=\"_blank\">on the OliNo website<\/a>. Here the results are given.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_S_and_P_spectra_at_1m_distance.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20002\" title=\"IL_11x1225P4LD_S_and_P_spectra_at_1m_distance\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_S_and_P_spectra_at_1m_distance-400x251.png\" alt=\"\" width=\"400\" height=\"251\" \/><\/a><br \/>\n<em>The power spectrum, sensitivity curves and resulting scotopic and photopic spectra (spectra energy content defined at 1 m distance).<\/em><\/p>\n<p>The S\/P ratio is 1.2.<\/p>\n<p>More info on S\/P ratio can be found <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/12\/14\/sp-ratio\" target=\"_blank\">on the OliNo website<\/a>.<\/p>\n<h3><a name=\"kleursoort\">Chromaticity diagram<\/a><\/h3>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_chromaticity.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20003\" title=\"IL_11x1225P4LD_chromaticity\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_chromaticity-400x374.png\" alt=\"\" width=\"400\" height=\"374\" \/><\/a><\/p>\n<p><em>The <a href=\"http:\/\/en.wikipedia.org\/wiki\/Chromaticity\" target=\"_blank\">chromaticity space<\/a> and the position of the lamp&#8217;s color coordinates in it.<\/em><\/p>\n<p>The light coming from this lamp is inside area of class B. This class indicates an area that is defined for signal lamps, see also <a href=\"http:\/\/www.olino.org\/us\/articles\/2010\/03\/06\/light-with-the-color-white\" target=\"_blank\">the article on signal lamps and color areas on the OliNo website<\/a>.<\/p>\n<p>Its coordinates are x=0.4566 and y=0.4049.<\/p>\n<h3><a name=\"cri\">Color Rendering Index (CRI) or also Ra<\/a><\/h3>\n<p>Herewith the image showing the CRI as well as how well different colors are represented (rendered). The higher the number, the better the resemblance with the color when a black body radiator would have been used (the sun, or an incandescent lamp). <a href=\"http:\/\/www.olino.org\/us\/articles\/2009\/11\/30\/a-close-look-at-the-color-rendering-index-cri-or-ra\" target=\"_blank\">Practical information and also some critics about the CRI<\/a> can be found on the OliNo website.<\/p>\n<p>Each color has an index Rx, and the first 8 indexes (R1 .. R8) are averaged to compute the Ra which is equivalent to the CRI.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_cri.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-20004\" title=\"IL_11x1225P4LD_cri\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_cri.png\" alt=\"\" width=\"367\" height=\"251\" \/><\/a><\/p>\n<p><em>CRI of the light of this lightbulb.<\/em><\/p>\n<p>The value of 83 is higher than 80 which is considered a minimum value for indoor usage.<\/p>\n<p>Note: the chromaticity difference is 0.0018 indicates the distance to the <a href=\"http:\/\/en.wikipedia.org\/wiki\/Planckian_locus\" target=\"_blank\">Planckian Locus<\/a>. There is no norm yet that states what the max deviation from white light is allowed to be. A reference with signal lights as a reference is given in the <a href=\"kleursoort\" target=\"_self\">chromaticity<\/a> diagram.<\/p>\n<h3><a name=\"spanningsafhankelijkheid\">Voltage dependency<\/a><\/h3>\n<p>The dependency of a number of lamp parameters on the lamp voltage is determined. For this, the lamp voltage has been varied and its effect on the following light bulb parameters measured: illuminance E_v [lx], the lamppower P [W] and the luminous efficacy [Lm\/W].<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_voltagedependency.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20005\" title=\"IL_11x1225P4LD_voltagedependency\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_voltagedependency-400x231.png\" alt=\"\" width=\"400\" height=\"231\" \/><\/a><\/p>\n<p><em>Lamp voltage dependencies of certain light bulb parameters, where the value at 230 V is taken as 100 %.<\/em><\/p>\n<p>The illuminance and consumed power do vary on a linear manner when the voltage is varied. This is to be expected when the lamp is dimmable.<\/p>\n<p>When the voltage at 230 V varies with + and &#8211; 5 V, then the illuminance varies about 2 %, so when abrupt voltage changes occur this effect is not visible in the illuminance output.<\/p>\n<h3><a name=\"heatup-effect\">Warm up effects<\/a><\/h3>\n<p>After switch on of a cold lamp, the effect of heating up of the lamp is measured on illuminance E_v [lx], the lamppower P [W] and the luminous efficacy [lm\/W].<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_startupEffect.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20007\" title=\"IL_11x1225P4LD_startupEffect\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_startupEffect-400x231.png\" alt=\"\" width=\"400\" height=\"231\" \/><\/a><\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_startupEffect_end.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20008\" title=\"IL_11x1225P4LD_startupEffect_end\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_startupEffect_end-400x231.png\" alt=\"\" width=\"400\" height=\"231\" \/><\/a><\/p>\n<p><em>Effect of warming up on different light bulb parameters. At top the 100 % level is put at begin, and at bottom at the end.<\/em><\/p>\n<p>The warm up time is about 35 minutes, during which the illuminance decreases with 9 % and the consumed power with 7 %.<\/p>\n<h3><a name=\"modulationindex\">Measure of flickering<\/a><\/h3>\n<p>An analysis is done on the measure of flickering of the light output by this light bulb. See <a href=\"http:\/\/www.olino.org\/us\/articles\/2010\/04\/12\/the-flickering-of-light-bulbs\" target=\"_blank\">the article on flickering on OliNo site<\/a> for more information.<\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_Flicker_waveforms.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20009\" title=\"IL_11x1225P4LD_Flicker_waveforms\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_Flicker_waveforms-400x212.png\" alt=\"\" width=\"400\" height=\"212\" \/><\/a><\/p>\n<p><em>The measure of fast illuminance variartion of the light of the light bulb<\/em><\/p>\n<table border=\"0\">\n<tbody>\n<tr>\n<th>parameter<\/th>\n<th>waarde<\/th>\n<th>eenheid<\/th>\n<\/tr>\n<tr>\n<td>Flicker frequency<\/td>\n<td>100<\/td>\n<td>Hz<\/td>\n<\/tr>\n<tr>\n<td>Illuminance modulation index<\/td>\n<td>48<\/td>\n<td>%<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The illuminance modulation index is computed as: (max_Ev &#8211; min_Ev) \/ (max_Ev + min_Ev).<\/p>\n<h3><a name=\"dimbaar\">Dim-ability<\/a><\/h3>\n<p>The lamp is dimmable with the following dimmers: the elimpo, Gira RL, Berker RC  and the low power LRC dimmer. See for the dimmers and their spec <a href=\"http:\/\/www.olino.org\/us\/articles\/2010\/06\/19\/dimmers-used-by-olino\" target=\"_blank\">a practical article on the dimmers<\/a> on the OliNo website.<\/p>\n<p><strong>The elimpo dimmer.<\/strong><\/p>\n<p><strong> <\/strong><\/p>\n<p><strong><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/elimpo_to_less_intensity.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20014\" title=\"elimpo_to_less_intensity\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/elimpo_to_less_intensity-400x253.png\" alt=\"\" width=\"400\" height=\"253\" \/><\/a><\/strong><\/p>\n<p><em>Dimming with the elimpo dimmer.<\/em><\/p>\n<p>Intensity: dimmable in mechanical area between 10-100 %.<\/p>\n<p>The consumed power decreases slowly and somewhat less fast as the illuminance decreases, resulting in a decreasing efficacy.<\/p>\n<p>The variation possible in illuminance is between almost 0 % to 100 %.<\/p>\n<p>The decrease of illuminance when the dimmer is inserted and put in its mechanical position with max output (80%), is negligible.<\/p>\n<p>The power without dimmer was 11.6 W and with dimmer set at 100 % was 12.2 W (5 % more).<\/p>\n<p><strong>The GIRA LR dimmer<\/strong><\/p>\n<p><strong> <\/strong><\/p>\n<p><strong><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/gira_to_less_intensity.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20015\" title=\"gira_to_less_intensity\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/gira_to_less_intensity-400x242.png\" alt=\"\" width=\"400\" height=\"242\" \/><\/a><\/strong><\/p>\n<p><em>Dimming with the Gira LR dimmer<\/em><\/p>\n<p>Intensity: dimmable in mechanical area between 0 &#8211; 100 %.<\/p>\n<p>The consumed power decreases slowly and somewhat less fast as the illuminance decreases, resulting in a decreasing efficacy.<\/p>\n<p>The variation possible in illuminance is between 0 &#8211; 100 %.<\/p>\n<p>The decrease of illuminance when the dimmer is inserted and put in its mechanical position with max output (100%), is 6 %.<\/p>\n<p>With dimmer and set at 100 % (no dimming) the power decreases with 6 % compared to no dimmer.<\/p>\n<p>The remaining power draws at 0 % dim position is almost 3 W.<\/p>\n<p><strong>The low power universal dimmer LCR<\/strong><\/p>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/lowP_LCR_to_less_intensity1.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20023\" title=\"lowP_LCR_to_less_intensity\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/lowP_LCR_to_less_intensity1-400x242.png\" alt=\"\" width=\"400\" height=\"242\" \/><\/a><br \/>\n<em>Dimming with the universal dimmer for low powers<\/em><\/p>\n<p>Intensity: dimmable in mechanical area between 20 &#8211; 100 %.<\/p>\n<p>The consumed power decreases slowly and somewhat less fast as the illuminance decreases, resulting in a decreasing efficacy.<\/p>\n<p>The variation possible in illuminance is between 0 &#8211; 100 %.<\/p>\n<p>The decrease of illuminance when the dimmer is inserted and put in its mechanical position with max output (100%), is 18 %. The power decreases with 10 %.<\/p>\n<p>The power consumption with the dimmer set at 0 % is almost 2 W.<\/p>\n<p><strong>The Berker RC dimmer<\/strong><\/p>\n<p><strong><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/Berker_to_less_intensity.png\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-medium wp-image-20024\" title=\"Berker_to_less_intensity\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/Berker_to_less_intensity-400x242.png\" alt=\"\" width=\"400\" height=\"242\" \/><\/a><\/strong><\/p>\n<p><em>Dimming with the Gira LR dimmer<\/em><\/p>\n<p>Intensity: dimmable in mechanical area between 0 &#8211; 100 %.<\/p>\n<p>The consumed power decreases as fast as the illuminance, so the efficacy remains the same.<\/p>\n<p>The variation possible in illuminance is between 25 &#8211; 100 %.<\/p>\n<p>The decrease of illuminance when the dimmer is inserted and put in its mechanical position with max output (100%), is 8 % ad the consumed power decreased with 9 %.<\/p>\n<p>The remaining power draws at 0 % dim position is almost 3 W but then still there is 2 5 % of the illuminance.<\/p>\n<h3><a name=\"foto\">Extra photo<\/a><\/h3>\n<p><a href=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_back.jpg\" class=\"thickbox no_icon\"><img decoding=\"async\" loading=\"lazy\" title=\"IL_11x1225P4LD_back\" src=\"http:\/\/www.olino.org\/wp-content\/uploads\/2010\/11\/IL_11x1225P4LD_back-400x313.jpg\" alt=\"\" width=\"400\" height=\"313\" \/><\/a><br \/>\n<em>Back side of the lamp <\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Jac&#8217;s Koopman presents an AR111 led lamp with GU10 fitting. The lamp contains 7 leds emitting a warm white light. This lamp is dimmable. This article shows the measurement results. Many parameters are also found in the Eulumdat file. See this overview for a comparison with other light bulbs.<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7,20],"tags":[],"_links":{"self":[{"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/posts\/6082"}],"collection":[{"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/comments?post=6082"}],"version-history":[{"count":9,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/posts\/6082\/revisions"}],"predecessor-version":[{"id":6450,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/posts\/6082\/revisions\/6450"}],"wp:attachment":[{"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/media?parent=6082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/categories?post=6082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/olino.org\/blog\/us\/wp-json\/wp\/v2\/tags?post=6082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}