So i got an incandescent hood with a capacity of (2) 25w bulbs.....I decided to put in 2 full spectrum 27watt CFLs and i must say its dam bright... Only thing im afraid is the heat generated from these bulbs. Even though theyre cfls, its still REALLY hot.. I wouldnt want my place to burn down. im thinking of installing a make shift fan to dissipate the heat.. any ideas?
It's not really necessary. The wattage, and therefore the heat produced, is almost the same whether you use the intended 25W incandescents or 27W CFLs; you just get a lot more light from the CFLs.
Regardless, those cheap incandescent hoods usually warp from the heat over months or years of use. It's a purely aesthetic issue, not a safety one or anything that affects the function of the hood; but a fan would help you avoid this if you want.
The incandescent hoods I've seen has side vents, small aluminum reflectors directly over the bulbs, and top vents over the reflectors. The most effective arrangement would be to draw air out from the top vents using a fan or two mounted on top outside of the hood.
One thing I've found you should never do is remove the aluminum reflectors. They're necessary to protect the plastic from the direct, rising heat coming off the bulbs - which is especially important when using the wider CFLs.
Carpeting plants can require a lot of light, especially in small tanks like a 10g. If you need even more light, instead of using bigger bulbs, cover some of all that exposed black plastic in the inside of the hood with extra reflectors; that'll give you enough for almost anything. Flat (not glossy) white reflectors are supposed to be best, and in the past I've used paint. Recently I did one with self-adhesive aluminum tape (sold in home improvement stores for sealing air ducts); it seems to work almost as well, and is easier to apply/clean/remove/replace. Just don't cover the vents.
Good luck with your tank! When you get it going, post some pics if possible.