Hi eveyone, So.. I have a friend who has been growing for a couple years now using a simple 4 x 4 grow tent in his loft with 1 sunmaster dual spectrum 600w grow light, at the moment his yield is around 4 ounces from each plant and he has 4 plants using the basic hydroponic method, he's pretty tight when it comes to spending money on further equipment, not that i blame him (if its not broke why fix it?) so i am planing to do my first grow and from researching on the net into different methods I was wondering if i want to keep my grow room completely secret from police and ther FLIR cameras would it be a better option to use a full spectrum LED light which is equivalent to 1000w as they dont let of near as much heat and with having to extract the smell and hot air through ducting through a hole in the roof which maybe a flir camera would see, or can a flir camera see the UV and Infared light that a LED light would give off? Also would i get the same yield or better because there will be no wasted light or heat due to using the blue and red light that a grow needs? Any suggestions please?