Hi, as many of you prob. know I am building a stealth cab.. and have decided to up my Watts, from 100W HPS, to a Dimmable 250W HPS... I plan to use a 250W metal halide for veg, but am stuck between 2 lamps... one of them is a 6500k metal halide........and the other is a 6500k & 8000k "Dual Arc"...