I have one of those cheap ($15) home depot clip on lights with the aluminum reflector.
Got a ton of salt creep on it from my old splashy sump, not a speck of rust. Ran a rag around it and it was like new.
I run a CFL in it I got from a pot err horticulture store. It claims to output tons of wavelengths that plants require. I've never had an issue with them burning out, but I do keep my ambient house temp pretty cool (18-20c)
My Chaeto seemed pretty happy with that setup.
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