Agreed dude, just he aint got to worry bought light leak, police aint bothered one plant here either, not like you can grow it in your back yard thought!lol! I'd like to just run a desk fan/pc fan rather than an inline for a stealth. Saying that hardware shops do decent small kitchen bathroom inline and vent fans which might be a good alternative, cheap and not very powerfull but for a small box and 150w should be fine, i run one, been going 24hrs for a year no probs.
Why not run this instead of one 150w, more light sources are better than one single point, 150w means LST and topping anyway so at least consider one of these -
http://www.aquaculture-hydroponics....tegoryID=340&subcategoryID=340&productID=2163