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    mercury vapor bulb replacement

    I was recently given some HID lights with 400w mercury vapor bulbs in them. They don't seem very bright. I know they lose brightness with age and need to probably be replaced. My question that I can't find the answer for is can I put 400w metal halide bulbs in there place without a ballast change?
  2. G

    Kentucky steel truss

    Has anybody had any dealing with this company. I have been thinking of buying from them. All suggestions are welcome. 30X60X12 all steel.
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