me again!! i just buy 2 more fixture for fluo,im now at 5x30watts. on thoes five i ave 2 gro lux. i see on a "specialized book" that its better to use warm withe than gro-lux because there lumen outpout is realy higher and if you mix it with some cool withe u will ave better result than gro-lux. is that true??? another question: when should i stop buying new fixture???(how much i need?) dont wanna waste money. i got 6 foot square (2foot by 3 foot area) and im now at 150 watts of lightning