just have another quick question really, i found a nice inline fan on ebay whats a nice price and i'm thinking of buying two of these for in and out take fans, 1 blowing at the bulb and the other taking the heat away to outside the cabnet.
would this be any good ? it says the Flow rate is 85 litres/sec , would this be ok for my size of space?

they sell reducers aswell, what are these?

link:eBay.co.uk: domus 150mm in line extractor fan motor hydroponics A1+ (item 190081394850 end time 19-Feb-07 17:26:57 GMT)

thanks