White Paint Lowers Temperature?

I have a small growbox hidden under my bed about 1 and a half ft tall and about 2 foot wide.. Well anyway i am using 4 23 watt cfls and the sides are wrapped with aluminum foil(low cost) . I been been battling heat problems for a while( in the high 90s) but yesterday decided to paint the sides white instead of using foil. When i looked at the temp a couple hours later it is only 81... my question is.. Can white paint reduce the temps by that much? or is it something else?

Please give me some feedback

its not the color as much as the foil is made to lock heat in and was creating a barrier so the heat couldn't escape

Yes. White reflects and black absorbs. For example a white car sitting in the sun is on average 50 degrees cooler than a black car

Omg.. I feel dumb.. I never thought of it that way. (foil is made to hold in heat) thanks you guys. Now i can put more bulbs in