Ideas for a Hood...

I have a few lights that need hoods, unless i put them all in 1 hood.Hmmm..well non the less i need an idea on how 2 make a good hood for

(1) 100w HPS,(1) 250w MH
(1) 400w HPS,(1) 1000wHPS
ive been trying to brainstorm ideas, the best i can come up with is one of those turkey baking tins they sell at the dollar store. but i heard somthing about aluminum being a conductor, and its unsafe next to the HPS/MH bulbs..?? so im alittle confused..once again, any help would be greatly appreciated.
 
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