ok ok i was thinking instead of a comp. fan i could use this Discount Hydroponics - Inline Duct Fan though i dont think it would be powerful enoough for the cool tube but i could get the 6in and attach it to Discount Hydroponics - LumeCool Reflector. As for lighting do you think Discount Hydroponics - Sunmaster Warm MH Bulbs would be good for both stages of growth or should i stick with the Enhanced HPS??