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I was reading a datasheet for an LED panel, and I saw a spec for "Light Degradation" after 1000 hours. Can I assume this means it's an OLED (Organic LED), and that the organic materials will decay over time, reducing the brightness of the light?

I prefer the "inorganic" LED materials, where lifetimes were measured in 100,000s of hours, so I need a way to determine the answer to this question.
YSM-1288CR3G2C is the specific part number.

clabacchio
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The Programmer
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2 Answers2

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No. Definitely not.
All LEDs degrade with time and having life times of under 10,000 hours is common.

LED YSM-1288CR3G2C data sheet here
This is almost certainly not an OLED.

Your Red LED has a Vf (forward voltage ) of 1.9 - 2.4 V
The Green LED has Vf of 3.2 - 3.5 V.

The Green LED is probably industry standard InGaN.
The Red LED is probably industry standard InGaAlP

As a guide to lifetimes, very very very few 5mm White LEDs have lifetimes to 70% of initial output of more than 10,000 hours.
This is despite the widespread claims for 100,000 hour lifetimes.

Any LED which achieves lifetimes o > 50,000 hours either comes from one of the top ~= 6 LED makers or uses their patents.

They say Red: 4.7% - 8.3% / 1000 hours Green: 11.4 - 15.3% / 1000 hours

The manufacturer is unusually brave and honest in quoting such a poor 1000 hour lifetime. This matches reality for many Asian sourced LEDs but most related data sheets do not tell the truth.

However - this loss rate is acceptable in many applications where the LEds are not illuminated "all day every day".

A good quality LED will have minimal loss of output in 1000 hours and many have MORE output at 1000 hours than when new.

The industry standard data sheet test period for output is 1000 hours with less than ?10%? decrease from initial output level and this is essentially worthless as all quality LEDs meet this with ease.

Russell McMahon
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I feel ,Yes the Organic LED which produces the Blue light has the Life Degradation more in Comparison to the other Color OLED. SO in the Specification also it is mentioned. In normal LED there is no any Life Degradation.

Bibek
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  • Normal LEDs also degrade during their lifetime, only much less. If a LED is specified at 100 000 hours (a typical value) it means that after that time light output has fallen back to 50% of the original. – stevenvh Mar 30 '12 at 07:00
  • Unfortunately, this answer is technically incorrect - see my answer – Russell McMahon Mar 30 '12 at 09:36