Misc. What emissivity should I use for LED strips?

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To accurately measure the heat of LEDs on a DIY panel using an infrared thermometer, it's crucial to consider the emissivity of the surface being measured. The emissivity of white plastic is approximately 0.84, which may be suitable, but other materials could provide better accuracy. The infrared thermometer's readings can be affected by the light emitted from the LEDs during measurement, so it's important to calibrate the device properly. Calibration can be done using a thermocouple or by placing the thermometer in a temperature-controlled oven to ensure it equilibrates before measurement. The primary objective is to measure the temperature of the components to adjust the voltage and prevent heat damage to the LEDs. The specific LED color, in this case, is white (1800K), and the focus is on measuring the temperature of the electrical components rather than the power dissipated or infrared light emitted.
HomeExperiement
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Hi!

I want to measure the heat of LEDs on my DIY LED panel with my infrared thermometer. That means that wrong emissivity could be like +/- 10 C in some cases. Should I take emissivity of white plastic which is 0.84 or are there any better options? Also does IR thermometer care if light from LEDs is shining while measuring?

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Calibrate with a thermocouple (or similar contact thermometer)? Or, put it in a temperature controlled oven and leave it long enough to equilibrate, then use you IR device to measure its known temperature.
 
HomeExperiement said:
I want to measure the heat ...
What is "the heat" ?
What is the LED colour, white, grow, or IR ?
Do you want to measure:
1. The temperature of the electrical components, and/or the enclosure ?
2. The power dissipated by the assembly ? (maybe use power = current * voltage)
3. The infrared light emitted ?
 
Baluncore said:
What is "the heat" ?
What is the LED colour, white, grow, or IR ?
Do you want to measure:
1. The temperature of the electrical components, and/or the enclosure ?
2. The power dissipated by the assembly ? (maybe use power = current * voltage)
3. The infrared light emitted ?
LED color is white (1800K).
Want to measure the temperature of components so that I can adjust voltage to low enough to avoid heat damage to LEDs.
 

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