When talking about LED lighting, people often see terms like L80B10 or L70B50, especially when checking product lifetime or warranty. But what do they really mean? Here’s a simple explanation.
L80 means the light keeps at least 80% of its original brightness after a certain number of hours.
L70 means it keeps at least 70% brightness.
The “B” value shows how many products might perform below this level:
B10 means 10% of the lights might be dimmer than 80%.
B50 means 50% could be below 70%.
So if a light is marked L80B10 @ 50,000h, it means:
After 50,000 hours, 90% of the lights will still be 80% as bright as when they were new.
Some LED lights come with a 5 or 7-year warranty, or a 50,000-hour lifetime. This doesn’t mean the light won’t fail — it means the light is designed and tested to stay bright and stable for that long.
Good performance over time depends on:
Quality LED chips
Efficient heat control (cooling)
Stable drivers (power supply)
A well-designed fixture
If a light claims 70,000 hours, it needs:
Even better heat control
Lower power per chip
More advanced materials
These lights often cost more but give you longer-lasting performance.
When choosing LED products, check:
Is there real test data?
Does the product have L80B10 or L70B50 certification?
Does the supplier explain the conditions (e.g. temperature, usage)?
These numbers help you know how reliable the light is, not just how long it lasts.
In short, L80B10 or L70B50 gives you a clearer picture of what to expect — beyond the warranty. We’re happy to provide testing info if you need it to make a confident decision.
