What emissivity should I use for LED strips?

  • Context: Misc. 
  • Thread starter Thread starter HomeExperiement
  • Start date Start date
  • Tags Tags
    Emissivity Led
Click For Summary
SUMMARY

The discussion centers on determining the appropriate emissivity value for measuring the temperature of white LED strips using an infrared thermometer. The suggested emissivity for white plastic is 0.84, which can lead to temperature measurement inaccuracies of up to +/- 10°C. Participants emphasize the importance of calibration, recommending methods such as using a thermocouple or placing the setup in a temperature-controlled oven for accurate readings. The primary goal is to monitor the temperature of the LED components to prevent heat damage by adjusting the voltage accordingly.

PREREQUISITES
  • Understanding of emissivity and its impact on infrared temperature measurements.
  • Familiarity with infrared thermometers and their calibration techniques.
  • Knowledge of LED thermal management and voltage adjustment principles.
  • Basic electrical concepts, including power calculations (power = current * voltage).
NEXT STEPS
  • Research the calibration techniques for infrared thermometers using thermocouples.
  • Explore the effects of different LED colors on temperature measurement accuracy.
  • Investigate thermal management strategies for LED assemblies to prevent overheating.
  • Learn about the principles of emissivity in relation to various materials used in LED enclosures.
USEFUL FOR

This discussion is beneficial for DIY electronics enthusiasts, LED lighting designers, and anyone involved in thermal management of LED systems, particularly those focused on optimizing performance and preventing heat damage.

HomeExperiement
Messages
55
Reaction score
5
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?

1637706483636.png
 
Physics news on Phys.org
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.
 
Reply
  • Like
Likes   Reactions: hutchphd
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.
 

Similar threads

Undergrad Is This....Right? Splitting LED colors is not working for me
  • · Replies 40 ·
2
Replies
40
Views
4K
Undergrad Creating White LEDs: Phosphor vs RGB
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad How do emissivity and absorptivity affect thermal imaging results?"
  • · Replies 3 ·
Replies
3
Views
3K
Deciding batteries for my circuit
  • · Replies 3 ·
Replies
3
Views
2K
Misc. Warming Barrels of Honey With Light
  • · Replies 20 ·
Replies
20
Views
4K
Can RGB LED simulate incandescent bulb 'glow'?
  • · Replies 3 ·
Replies
3
Views
3K
Misc. Isolation box to measure light source inside (closer to visible light)
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad Why is there a sharp spike of blue light in my spectrometer readings?
  • · Replies 9 ·
Replies
9
Views
2K
How to power up a DIY LED panel with a PC PSU?
  • · Replies 27 ·
Replies
27
Views
6K
How Can I Use a Photodiode to Detect LED Light for Spectroscopy?
  • · Replies 29 ·
Replies
29
Views
5K