There is no source of heat necessary to form light.
Led light bulbs no heat.
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Instead of heating up the bulb to produce light the led uses semiconductors that bond atoms with surrounding diodes to create power.
The energy consumed by a 100 watt gls incandescent bulb produces around 12 heat 83 ir and only 5 visible light.
In contrast the led has no.
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In addition there is heat conducted into the air by the bulb and the base.
Especially with high power leds it is essential to remove this heat through efficient thermal management.
In contrast a typical led might produce15 visible light and 85 heat.