Do-itT – BL-GU10-3x2GL-D-2700K45D1.
Posted by Marcel van der Steen in Light measurements No Comments»
presents herewith a GU10 ledlamp. The measurements from OliNo show that the lamp emits a warm white light with a color temperature of 2725 K. The lamp consumes 3.8 W and has a luminous flux of 136 lm. This results in an efficacy of 35 lm/W. The lamps energy category label is A.
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.
Do-itT – BL-GU10S-3x2GL-D-2700K45D1.
Posted by Marcel van der Steen in Light measurements No Comments»
presents herewith a GU10 ledlamp. The measurements from OliNo show that the lamp emits a warm white light with a color temperature of 2757 K. The lamp consumes 3.5 W and has a luminous flux of 124 lm. This results in an efficacy of 35 lm/W. The lamps energy category label is A.
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.
Do-itT – BL-GU10-3x2LB-D-2700K45Dxx1.
Posted by Marcel van der Steen in Light measurements No Comments»
presents herewith a GU10 ledlamp. The measurements from OliNo show that the lamp emits a warm white light with a color temperature of 3063 K. The lamp consumes 5.1 W and has a luminous flux of 308 lm. This results in an efficacy of 60 lm/W. The lamps energy category label is A.
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.
Non-visual effects of ocular light on human beings – The biological factors
Posted by Marcel van der Steen in Explanation 2 Comments»
This article explains a bit about the biological effects of light on human beings. It appears that next to rod and cones there are other cells sensitive to a certain part of the light spectrum and that influences our daily rhythm (circadian cycle); this is the cycle of sleep and being awake, where a hormone like melatonin plays an important role.
The spectrum of the light enables to compute the biological effect that it can provoke, amongst others in (1) the suppression of melatonin in the night and in (2) shifting the circadian phase. I used the vornorm DIN V 5031-100:2009-06 as the basis of the computation of several interesing parameters coming from the light spectrum.
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