Hi there, so this is the result, i found this material , 3º pic http://www.boltherm.pt/PT_termico.asp i think that i can use this insted of aluminiom foil
before i had 54 watts and now , i bought a 35 spiral cfl and switched the bulb 15w , so now i have 74 watts. If cfl have +/- 65 lumens/watt...