Whats the fan noise like on that viper LED ?
I have a Vipar 360W and it gives better results than my ms006 , i think this might be to do with the 11 spectrum as the visible light looks more like day light than the GN MS0006. The only downside to it is the noisy fans!
I have been thinking about getting another vipar, they have a new 500W 5w Diodes but im thinking this might bleach the plants as its going to need to be placed higher from the plant tops!
It's great there is another quality LED producer on the scene but comparing a 360w vipar to a 180w MS006 isn't accurate you should be comparing it to 2 MS0006.