I have always been under the impression that an "HQI" term is a double ended metal halide designed to run on an M80 ballast (for a 250W). A "mogul" style metal halide screws in to the socket and runs on an M58 ballast (for a 250W). Any brand of halide system can come with quick connects (PFO, Hamilton, Ice Cap) so long as they are rated at 600V. As for the bulbs, DE, SE style terms are new to me. Can you explain these terms? Are we just talking about the same thing using different terms?
Rick
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