I am all over the place with lighting. This being my first grow, with hand me down 200 watt HPS for first month, then I got ahold of a Vipar 450 LED, and now I have 2 Mars 300 to go with it. Currently running is the ViparSpectra and 1 Mars 300. I'll have a second room before long though and it will all get used.
I really like the ViparSpectra. It has a lot more blue than the Mars. The Mars is red heavy, and full spectrum the whole time rather than switched. I am gonna use them for auxiliary flower lights in a larger tent. The mars also puts out more heat.