Hours until light output drops to 70% of initial lumens.
Standard series: L70 ≥ 50,000 hours
Premium series: L70 ≥ 80,000 hours
Our lab data: For every 10°C reduction in Tc, lifespan doubles.
| Tc measurement | Estimated L70 |
| 85°C | 25,000 h |
| 75°C | 50,000 h |
| 65°C | 80,000 h+ |
Tip: Ask for real-case Tc measurement, not simulation.
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