In the tungsten bulb the heat trajectory is
short. It starts with the thermal resistance from the filament to the glass and
it ends with the resistance from the glass to the atmosphere. In high-power led panel light home depot it is not that
short because of other parts that stand on the way like the slug, the board and
the heat sink. However it is very crucial for us to understand the difference
of the heat delivering - in high-power LEDs we talk about conduction, not
radiation.
The temperature of the LED is directly
linked to its colour and if a precise colour is needed the optical design
should be optimized. Different colours are made by combining base colours and
for white colour - all colours are used. That means that if a white colour is
used, the temperature will be higher than the temperature in all other cases.
Usually a colour sensor is used to insure the proper colour during the
temperature changes and the aging of led panel light
manufacturers.
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