Idea is that i do a stealth custom-made speaker box with three speakers, receiver and maybe car radio. Two of the speakers should be middle-low freq. on the top and a sub at the bottom. The dimensions would be around cca.45x35x90 cm depends what speaker size do stores have...Bigger speaker the better I think that 125w cfl dual+ maybe 2 or 3 23W cfls would do the trick... Or 200w cfl dual...I dont know yet... The only hps i could think of is 70w...Hps/mh its just not for that kind of box For ventilation i will add two 120mm computer fans (1000 rpm 69m3/h 13 dB/A) and later one 220mm fan to supply the crop with air I didnt have cfls before so i wonder if cfls are much cooler that hps (hps is hot like hell). I was planing to get out cca. 20 000 lumens from cfls with mixed spectrum light. I think that idea is stealthy enough to try. After all i can always listen to music Please give me some ideas before I order this box Ohh and...For growing medium i have choosen soil 0r maybe one grow coco in large pot over the whole area