Fire Hazard?

Okay, I'm working on getting a computer case to grow in, but until then, I made a small 4" X 6" X 9" box with cardboard. There is one 23 watt CFL that sticks into the box through a hole and one computer fan for exhaust. Can the cardboard catch fire? I haven't tested it and I'm not using it because I think it might, but do you guys think it will burn?

No it wont burn , CFL barely gives off any heat , the only way ull start a fir is if u wired it worng. I have some of my plants resting up against 3 ft CFL's card board wont set flame trust

Okay, thanks man, I was starting to worry about what I was going to do.