Quote Originally Posted by vannewb
But i'm still waiting for you to explain where that 1000w of electrical energy goes if not into heat energy.

Or put another way: can you please explain how an induction lamp using 300w of electricity would produce less heat than HID lamps using 300w, if they are both in the same sealed room?
it is converted into light not heat .watts is watts its true but ya'll need to understand that this is a measure of energy used not of light output.when the light fixture converts electricity to light some of the energy is lost as heat. incandescent bulbs lose most of that energy as heat....LEDs not so much..... i think this may be called lighting efficiency or something like that ..........the point being that fixtures that convert energy into light with less heat generation will heat the room less.