I am on a light forum and there are debates about watt heat output of lights.
I'm using my common sense for the debate but can't find the data online to support my ideas.
People are thinking that a 400 watt heater produces the same heat as a 30% efficient 400watt light. And further same as 400 watt of 60% efficient lights.
Now my logic says that heat being the main by product of a heater will of course cause the 400 watt heater to produce the most heat
A light that's 60% efficient at light production like new LEDs cannot produce the same amount of heat because its byproduct is photons or light. But still produces heat as its not 100% efficient.
Can any of you geniuses explain to me smartly what heat production wold be produced from lights?
HID lighting is about 30% efficient
New led is getting to 60% and more
But people think that 400 watts translated directly to heat
update: I think I figured it out. The room is much cooler because: the 60% energy as light from LEDs is projected to concrete floor which goes for many meters outside the room and connected to the earth thus dissipating it effectively outside of my room. The remaining 40% heats the rooms air Where as a less efficient light uses 70% of its energy to heat the air and only 30% is sent to the concrete and this dissipated to earth and other rooms. Am I correct here? –