Setting up T5 lights in my canopy...

[MikeP]

I want to set up a T5 ballast and bulb (4 pin 18 inch bulb) for my 30g tank. I can buy the supplies at a local light store. My current canopy/light holder can be gutted and there should be plenty of room to fit the ballast and bulb. I need to know if heat will become an issue and also if this is a typical way of doing it. I don't want to build a new canopy if I don't have to because this tank will be tanken down in a few months when I set up my new bigger one. I am still a newbie so If you think I am doing something wrong or could do things differently/better please let me know.

Any help/info would be great
Thanks