(1) provisions of the lamp voltage and power supply voltage are compatible, for example: 110V lamp 220V voltage, burnt the built-in stabilizer.
(2) fluorescent lamps, HID lamps use a scope the provisions of voltage
A) power supply, high voltage will reduce ballast, the life of the bulb.
B) power supply, the voltage is too low, not lighting or reduce the life of the bulb. Lamps permitted voltage range
Fluorescent lamp +-6%
HID lights +-6% (when using metal halide lamps but within +-5%)
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