This subcategory used to be full of layout diagrams; and I'm digging for them. But my memory is fried from this Jawa Pie and Girl Scout Candy, help me out lol. I am debating doing bare bulb tree farm with 315w LEC's on 40" centers. My last few runs, Phillips Elite Agro LEC's have blown away 600w bulbs and 630w of them blows away a 1000w DE. Side by side the choice is obvious; I will never go back to HPS. Recently Sunlight supply has come up with a bare bulb socket making this entirely possible at $265 a light no reflector. I can't go wrong with this setup considering the city is dead set on invading any homes for grow-room inspection that consume more than 5000kwh/month. I could run 12-14 315W LEC's with A/C and CO2 closed environment given those constraints. I also love the idea of this level of efficiency as it seems 2-3lbs per plant with only 915w of light around it is possible (genetics willing of course). I am looking for the optimal plant layout to run with 12-14 lights? 12 plants, 12 lights? Do you think 40" centers (treat them like 600w bulbs) is optimal?