i think the question was what is too much light? i've used 6-1000 watt hps lamps over a 4x8 before in a SOG grow before and had really good results. No staging, just straight 12/12 18,000 lumens per square foot. But you have to remeber plants can only use as much light as they have available co2, they can only use as much co2 as they have nutrient, they can only use as much nutrient as the root have available air etc. everything needs to be in proportion, you can raise one w/o raising the rest to achieve the best results.
bmwboy713 Reviewed by bmwboy713 on . Who likes numbers? Alright I've been researching, brain storming, tokin', and drinkin', trying to figure out how to put my lighting system to it's optimum use. I'm working with a 1,000w HPS system. Thats with a MH conversion bulb, and eye hortilux HPS bulb I've figured the numbers with 3 possible garden sizes 4x4, 4x5, 5x5. I'll start with the brightest. 4'x4' area=16 square feet or 62watts/ square foot HPS=9,062 Lumens/ square foot MH =6,562 Lumens/ square foot 4'x5' area=20 square feet or 50watts/ Rating: 5