Sounds like a decent reflector setup, But 1 thing, aluminum foil is more expensive than going to Wal-Mart and in the camping section, they have these awesome things called "Emergency Camping Blankets" $4 ea. And each blanket is 52"w X 84"h. It covers a lot more area for a better price. Not to mention, it wont retain heat the way foil does. Try it and lemme know what you think.

Good Luck!

Wenzel Waterproof Emergency Camping Blanket - Walmart.com
killfrenzi Reviewed by killfrenzi on . DIY Reflective Cover! So I'm growing outdoors but I'm extending vegging hours indoors in my bathroom. It will also be used all day on very cloudy days. I'm having 3 x 23w (6500k daylight spectrum) CFLs placed on my bathroom mirror. I've got 4 plants that will stay in these 5-inch pots until harvest. I only know 1 is female, and I will stick to the sun's light with that one. Hopefully I can get another female and destroy the rest. Anyway, I want to build a cheap reflective hood but I dont know what shape to give it. Rating: 5