i was searching around to find a lumens spec on the marshydro 300 watt 1st gen light, and I found the answer deep in the mars website, the 300 watt delivers 7150 lumens, that allot lower than I had expexted, A 400 watt metal halide bulb easily puts out 30,000 lumens easy, and it is recomended to have 45-60 watts (true power draw) per square foot of grow room, So I have 6 square feet of space, I need 300 true watts min. and my mars only puts out 170 watts, So I am 130 short, I either need to order a second 300 watt mars and hang them side by side, or get a couple of cree cobs an mount them to the mars metal housing and have them hang off the corners, the wheels are turning tonight, thanks to Obviously for his help in getting me to rethink the possiblities on this