Quote Originally Posted by seventhchild
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.
"the point being" that 300w of electrical energy doesn't just disapear. Once it's put into a room, it's coming out in some form or another. In a SEALED room it obviously cannot leave as light energy.

So what do you think happens with all that light you're shining in the sealed room? It bounces around a bunch and is eventually absorbed by walls and items as heat energy. (and if you have plants, a negligible amount of chemical also).

At this point the question that people claiming "300w induction lamps will heat up a room less than 300w HID" are unwilling (unable?) to answer is where does the electrical energy from HID lamp end up if not, eventually, heat energy?

(p.s. induction lamps have a LOWER lumens/watt efficiency than HID lamps, which implies even if you were able to radiate away the light energy, it would still result in more heat than HID)
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