Heating LED strips on chipboard (cabinet simulation)

Measurement description

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.

Test bench and measuring instruments

I created a special test bench.

with a diffuser
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.*

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).

Fluke TiS65

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.

Results of chip temperature measurements of LED strips on chipboard