The aero bulbs have a unique base to their bulbs so you have to buy their bulbs, unless you modify your aero to accept regular cfl bulbs. The modification is fairly simple if you are at least a bit mechanically inclined. It's a cheap fix, maybe 10 bucks for sockets and epoxy or silicone( I used silicone in my fix). If you're interested in doin this fix let me know and i'll try an locate a link that will walk you thru this fix I use daylight cfl's (6500K) during the veg and then I switch to soft white cfl's for flowering. Been growin this way and have no problems.