There is no source of heat necessary to form light.
Led light bulbs no heat.
In contrast the led has no.
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The heat produced by an incandescent bulb is largely emitted in the form of infrared radiation so it heat up everything in the room around it.
An incandescent light bulb creates light by warming up the filament that throws off light.
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In contrast a typical led might produce15 visible light and 85 heat.
The energy consumed by a 100 watt gls incandescent bulb produces around 12 heat 83 ir and only 5 visible light.
In addition there is heat conducted into the air by the bulb and the base.