At the basic level, you're looking at:
* Circuit Protection (fuse or circuit breaker) * Cabling * Mounting hardware (for the light fixture itself) * Within the fixture; A socket, bulb, bulb protection (cover, or sheild)
Common table salt NaCl is a metal halide.
Between Metal Halide and Mercury Vapor the higher output is emitted from the Metal Halide lamp.
An HQI metal halide lamp belongs to the family of metal halide HID lamps. Hydrargyum quartz iodide (HQI) lamps differ from standard metal halide lamps in that they are often smaller and are offered in double ended versions and require a special socket. The gasses and metal halide salts used in HQI and standard metal halide lamps are the same.
No. A 70 Watt metal halide bulb can not be replaced with a 150 Watt halide bulb.
Yes assuming the ballast is also for a metal halide lamp.
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A metal halide ballast works just by transforming the line voltage into much more useful voltage to the metal halide, and by regulating the current so that the bulb will have its useful life at the most.
Yes. The metal frame and body of the car is electrical ground.
Yes the ballast and starter are the same you can run halide in hps, but not hps in halide.
Electrical equipment no longer used in the workplace should be disconnected from the power grid, at the least. Where reasonable, it may be removed and its metal components sold for scrap.
No, the ballast has to be matched to the lamp. 250 watt ballast, 250 watt lamp. Also be sure to match the lamp type to the proper ballast even though the wattage is the same. HPS ballast to HPS lamp, Metal halide ballast to metal halide lamp and mercury vapour lamp to mercury vapour ballast.
No. The lamp has to match the ballast. The lamp will not ignite if the wrong ballast is used.