I'm thinking about building a couple HOB
lights for my tanks. One will be for my 10g and other for my 29g. The ballast for both will be mounted low and behind as a counterweight to hold the head a few inches above the open top. The 10g will get a M85 (70 watt) metal halide in a "stand light" head. The 29g will get a M59 (175 watt) metal halide in a "pole light" reflector as part of its head.
Main question: what material do you think would be best for this project? Cost very important, as is weight.
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