Limitations with HID Lighting
All types of HID lamps (mercury vapor, metal halide, and high-pressure sodium) require a time of several minutes to start, and most require an even longer time to restart from a hot condition. Therefore, do not use photo controls with HID lamps in applications where fluctuations in daylight during the day, typically caused by clouds, might require starting or restarting during occupied periods.
Limitations with HID Lighting All types of HID lamps (mercury vapor, metal halide, and high-pressure sodium) require a time of several minutes to start, and most require an even longer time to restart from a hot condition. Therefore, do not use photo controls with HID lamps in applications where fluctuations in daylight during the day, typically caused by clouds, might require starting or restarting during occupied periods.
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