Most LED lamps that fail do so early: a weak solder joint, a driver capacitor at the edge of its rating, a filament strip with a cracked bond. Those failures show up in the first hours of operation, at temperature. So every lamp that leaves our factory has already run for eight hours at 45 °C in our burn-in room.
What the room does
The room holds 12,000 positions on powered racks. Lamps go in straight off the line, and a technician checks every rack at the second hour and the eighth. A lamp that flickers, dims, or fails to strike is pulled, logged against its line and batch, and opened by an engineer the same day.
What it costs, and what it saves
Burn-in adds about one day to our lead time and roughly US$0.01 per lamp in power. In return, our field return rate on filament lamps over the last three years is 0.38%, against an industry figure usually quoted between 1% and 3%.
What you receive
Every shipment’s inspection report lists the burn-in batches, the number of lamps pulled and why. If you would like to see the room, it is part of every factory visit.
