Recent content by stefanomoret

Hi, did you have any good results from your search?

Same opinion here, I have looked into different sources but haven't really found a good answer to this.

There are even published papers which make confusion between those terms! Btw, the luminous efficiency wikipedia is referring to is simply calculated by the ratio of the source luminous efficacy (about 15lm/W) over the maximum possible luminous efficacy (683lm/W). Not sure about what you write...

Sure. In lighting technologies, there are actually different parameters to account for these phenomena, i.e. luminous efficacy of a source and luminous efficacy of radiation. I assume with "heat" here you mean heat by conduction and convection from the bulb. For a typical incandescent bulb...

If you read my post above, of course I know the difference between useful light and heat losses. My question, which if you want concerns HVAC loads, but it actually just concern heat transfer in general, wants simply to see whether the transmission of heat through radiation might be different in...

The point is that in many online sources there is a distinction between power transformed into visible light and power lost as heat. My doubt is if there's any basis to this distinction or if, as I think, all the power is transformed into heat and the fact of part of it being visible to our eye...

Hi all, I have a doubt which I would like to hear your opinion and answers about. So, I was comparing different light sources for my research, and I started thinking about a sentence which I've always taken for granted: incandescent light bulbs waste more than 90% of their power as heat...