I was trying to cool my 250w hps without a cooltube and what I figured out is to cool the bulb from the top of the reflector using a cradle spot I made in which I put one of those square frozen thingies made from super hard plastic and it works AMAZING. My question is, in long term will this harm the bulb, so far it's doing great, my logic is in winter the fixtures get covered in snow and they work, so any electricians or experts chime in.