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IEC 60360: Lamp Cap Temperature Rise — Standardized Thermal Assessment for LED Bulbs
LED Bulb Cap Above 120°C = Danger: IEC 60360 Standardized Temperature Rise Test
IEC 60360:1998 specifies lamp cap temperature rise measurement. The LED bulb cap is the thermal path for driver+LED heat. Excessive temperature→driver electrolytic capacitor life halves per 10°C→lampholder plastic softens.
| Cap | Max ΔT(K) |
|---|---|
| E14 | 135 |
| E27 | 165 |
TNLab — LED bulb life bottleneck is not the LED chip, but the driver electrolytic capacitor — whose temperature depends on cap thermal design.
