Depends on the time of day of course ...lol...I have about 700 in Veg 150 from a HPS to keep things warm and dual and quad CFL,s on clamps to light up the side(s) mostly 5K 13W up to 3 or 4 34-42 watters in addition I have 24 Watt LED grow panel 3:1 red to blue just for backround and also for backround have a homemade electrical chain of $1 plastic fixtures I find way better for capacity and stability but you cant move them so basically I have a 3-tiered lightning system so even if a particular plant isn't directly under a CFL or the HPS canopy it still gets enough to not look like weak freak. I rotate all the time..this is all being done on crazy passed down seeds from many sources so I am going on phenotypical traits that I want. In the flowering room I average about 800 or so...for now the long narrow but good height area has a 400 HPS open wings all diamond reflector material and a lot of mostly 2.7 K CLF's some 13 W but alot of them are way bigger including a 55 or 60 W that puts out 4200 Lumens...I just started to flip 10 of these plants started on Halloween and at this point thanks in part for some of the folks here reiterating the more light is better I have to whole heartily agree that for my first totally indoor grow I feel way more confident and I think my plants agree..I have such a close inter node distance one of my plants reminds my of the Adams family character "cousin it" I know I am aging myself but that is exactly the characteristics I have been looking for .. a plant so dense you can easily trim the heck out of sun leaves only to find more dense stalks being able to kick in the chlorophyll game..only time will tell if the yield is a big as the yell....short answer to the question....day - 1400W evening(4hrs) - 800W night (fans-heaters-green work lights) - 180W