... difference, which is ≤ 10℃,among chip welds, circuit board and lamps after working stably with full load for 1 hour. (Simulated ... mechanical stress, salt mist, vehicle exhaust and corrosion from cleaner. The color of lamps and covers are finally decided by users ... system debugging of high mast light pole, light panel, lamps and power distribution system. Safe production fees should used for their ...