Gadgetboy has give you a good list for led supplies, but the easiest ways to ventilate tents are with Nodor Pucks or the portable electric scrubber at scentless.bz
Add that to the list because if the correct led lights are used the heat is not nearly as big a factor as the smell!
Actually a faster more likely to be safe (health wise) way to no smell is the small portable electric scrubber, but if you really want to DIY without using fishtank carbon try using the wrap that is for filter systems and comes with velcro straps. Both can be had easily and fairly reasonably at...