Will aluminum foil block heat from a heat lamp?

So I have a Crested Gecko, full size 43 gram adult male, and his feet are not sticky at all, like the only thing he can climb with are his nails. I just got him 4 days ago at Repticon, and I have aluminum foil on top to keep humidity in, with 4 small .5" x .5" holes. Its about 70 degrees in my house and... show more So I have a Crested Gecko, full size 43 gram adult male, and his feet are not sticky at all, like the only thing he can climb with are his nails. I just got him 4 days ago at Repticon, and I have aluminum foil on top to keep humidity in, with 4 small .5" x .5" holes. Its about 70 degrees in my house and doesnt drop at night. Does it need to? Also, will the foil block the heat from a heat lamp when I get one? Also, what Watt bulb should I get? (25,50,75,etc)? Thanks for any answers to any of the questions!
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