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  1. Lighting Design
    Does anyone know where there is good info on the theory of metal halide pulse start lights? The fixtures I'm interested in are: 250W Pulse Start Constant Wattage Autotransformer Ballast. Which consist of: 1. Ballast which appears to be a transformer with multi tapped input and leads between...
  2. Lighting Design
    With HID/ HPS Ballast / Lamps: Can arcing between the lamp and the socket cause ignitor failure or can faulty ignitors cause arcing or both?
  3. General Electrical Discussion
    I have a customer who has some HID (Metal Halide) lights under her house. They were not working when I got there and there was supposed to be a switch that controlled the circuit they are on. Well, I disconnected the switch completely, (took apart the switch and the neutrals), and now the...
  4. Lighting Design
    I know that induction sales people sing reduction in wattage and kWh usage, but conveniently omit the light output. I came across GE UltraMAX HID brochure, which claims to reduce lamp decay significantly, so that a lower wattage lamp can be used to meet the target mean lumen goal. They also...
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