I run a 5x5 tent and use 1300 watts from wall , a 600 watt in middle and a 350 watt on each side of that. That gives me a even light source across the hole tent. But in I don't need all that power to get big buds. LEDs at 18 inches above plants and not even turned up to half way can get 800 par which the plants perform well under. Probably 1500.00 in those three light with the Samsung LM 301-H with the IR-660. I'm thinking I could probably buy a new led that's the bar system LEDs 800 watts and produce the same thing to get 800 par over plants. The new 880 watt mammoth looks like a new good to consider. I would order one but not waiting to get anything once I pay for it.