The Cooltube or Coolshade as it is sometimes known is a clear glass tube with a lamp mounting bracket in its centre, when used with fans and 150mm ducting, not supplied, can be made into a fully airtight unit. Capable of using 150w, 250w, 400w, 600w and 1000w single ended lamps it is perfect for removing the excess heat generated by HID grow lights without leaking unpleasant odours; as far as we know it's the only fully sealed system on the market, other manufacturers claims that theirs are but in our experience they are definitely not. Supplied complete with a pair of detachable external reflectors to maximise reflectivity.

Air is usually pulled (but can be pushed) over the lamp by adding an extractor fan to one side of the tube, the hot vented air is then expelled away from the growroom and plants. They're very effective, somewhere in the region of 80-90% of heat is removed, and are therefore very popular with indoor gardeners who have limited space to work with.