You need the light high enough not to burn the tips without fans.. that way if a fan dies, you don't burn your plant to death. If you're home, that doesn't matter, but when you're at work it may be a good idea. I have a 6" fan I use to cool my lamp off, because it doesn't even really cool the bulb, trust me, and that's not what you're going for, but it cools the reflector and blows the hot air the bulb produces away. I used to touch my reflector and it burned me, and now I can touch it and it just feels completely normal, I can't feel warmth, just, normal. ALSO have a fan that blows any heat the plants may be getting and don't want away from their leaves, if you can only accomodate the top of the plant, do so, and leave that door open if you can, you will run into mold problems keeping that air pent up in there that hot with all that humidity. I hope this helped.