Robert Allen wrote
> I'd check a large hardware store, and if that fails, a marine
> supply store (tell them you want a full battalion :-)). I've
> seen fixtures which were absolutely waterproof. Typically they
> also had a metal skeleton to protect the bulb.
My friend has just bought a metal halide fixture for his aquarium. The
fixture is from Philips which is designed for outdoor use, i.e.
waterproof. The range of bulbs includes sodium and metal halide - 70W,
150W, 250W, and 400W.
I have a brochure here. The sodium lamp fixtures are designed SNF,
mercury HNF, and the metal halide MNF.
FYI, the 70W MH fixture with bulb costs HK$1650 and the 150W HK$1750
(USD 1 = HK$7.8 ).
In a lighting supply store, similar fixture costs approximately USD30
cheaper than the Philips ones.
--- Shing Lam shlam@hkueee.hku.hk