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Hi
I am exploring a litttle of light theroy on Vray and i am facing some questions about luminous power on a vray light.
Through my search, I found at many place that a incandecent bult of 40W emit around 500lm. This is confirm by the efficacy of lights who say that a 40W incandescent bulb would generate 12.6lm/W = 504 lm. This is the outpout of the light source and in a Vray light, you would put a luminous power and put 504 to have a 40W bulb. When I do it, the result is a equivalent of a multiplier of .343 who is very low.
Even if I don't count the effiency of light and I say that there is no lost, where 1W = 683lm it's give me 40W*683lm/W = 27320lm = multiplier of 18.6. that reslut is way too high for a 40W bulb.
I get something wrong but where? Is it my comprehension of Vray Light? Must I work in luminance and start with the light I want on the surface and not the emmited light?
Thanks
I am exploring a litttle of light theroy on Vray and i am facing some questions about luminous power on a vray light.
Through my search, I found at many place that a incandecent bult of 40W emit around 500lm. This is confirm by the efficacy of lights who say that a 40W incandescent bulb would generate 12.6lm/W = 504 lm. This is the outpout of the light source and in a Vray light, you would put a luminous power and put 504 to have a 40W bulb. When I do it, the result is a equivalent of a multiplier of .343 who is very low.
Even if I don't count the effiency of light and I say that there is no lost, where 1W = 683lm it's give me 40W*683lm/W = 27320lm = multiplier of 18.6. that reslut is way too high for a 40W bulb.
I get something wrong but where? Is it my comprehension of Vray Light? Must I work in luminance and start with the light I want on the surface and not the emmited light?
Thanks
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