Hey guys thanks for the replies

I can spend a bit more on a better fan now, As i wanted to spend £100 - £120 maximum combined for the ventilation and the cool tube but i just won a cool tube on eBay for £21 delivered which was nice so i can spend a bit more on a fan

Also i understand the whole fan thing, I plan to put it about 1-2ft after the light so it should work pretty well

i only have a small space to work with at the moment so i agree i need to splash out on buying decent ventilation.

Thanks for the help