Better chance with 2 400w lights than one 600w...... and the wing reflectors are a win IMO. My last grow was a 400w wing 2'x2' single plant, and 2 plants under a 2'x3' 600w tube..... the 2 screens were within 8g of eachother..... All about taking the time to get the bud sites across the screen.... It looked like 20 lil cola's everywhere, was beautiful....