Heating LED strips on chipboard (cabinet simulation)

I measured the LED chips' temperature and the strip base hanging in the air in the last experiment. Now i simulated mounting the strip under the cabinet in a groove ½" deep.

- At the bottom of the groove. Direct contact between the LED strip and the chipboard. Without an optical diffuser.

- At the bottom of the groove. Direct contact between the LED strip and the chipboard. Additionally, i install a diffuser. The diffuser/shield closes the ambient air access and blocks the heat dissipation from the LED chips through the air. I do the temperature measurement immediately after removing the diffuser to access the measuring device.

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Test bench and measuring instruments

I created a special test bench.

I measured the temperature of each sample after 30 minutes of operation. During this time, the LED strip is fully warmed up and its temperature stabilizes.

*Generation and dissipation of heat from the LED chip without diffuser.*

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*Generation and dissipation of heat from the LED chip with diffuser.*

I make sure that the 24V power supply voltage remains constant and i measure the temperature of the LED strip chips in a room with an air temperature of 73 °F.
I use a professional Fluke TiS65 thermal imager (accuracy for temperatures 80-160 °F < 3 °F).

This device records the temperature of the hottest chips in the central part of the field of view.

*Example of automatic search and display of the hottest point in the central part of the field of view.*

I also record the heating of the chipboard on the back side. I evaluate the effects of the chipboard's thermal conductivity and the danger of heat to objects inside the cabinet.

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