Two 600Ws will give you better "coverage" and more flexibility in your positioning of them.
turtle420 Reviewed by turtle420 on . 1000w on light rail vs 2 600w Would it be better to run one 1000w MH/HPS on a light rail or two 400w mh/600w hps. Going to have 2 rubbermaid bins with about 6 to 8 pants in each and a foot in between the bins. Thanks for all your input! Rating: 5