A lil' Ingenuity

[Ghan3sh]

I wouldnt worry too much about the heat or electrocution. A normal fluorescent tube wont get too hot. Even after an hour of light its still possible to touch it without burning. So you can be pretty sure the styrofoam wont start melting.
You might get some condensation (although i doubt it with the fan and the low difference in temperature) but never enough to cause a shortcircuit. Water inst really a good conductor for electricity, you need to add salt for that.
Very nice setup!