Question

How much energy from lighting is converted to heat?

Answer 1

This means that about 80 percent of the electrical energy is converted to light, while 20 percent is lost and converted into other forms of energy such as heat. With traditional incandescent light bulbs which operate at 20 percent energy efficiency only, 80 percent of the electricity is lost as heat.

Answer 2

LED converts heat into light. A light-emitting diode (LED) that emits more light energy than it consumes in electrical energy has been unveiled by researchers in the US.

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