do you keep the water level all the way to the top?...is that a must with dwc?

what about the lighting?
k1ng87 Reviewed by k1ng87 on . deep water culture for the first time so I setup a deep water culture system this weekend with 5 white widow seeds i got from nirvana. I made a room about 2.5ft deep and about 12ft long. Got 5 buckets, filled them a third of the way up and got some airstones. For lights I have 4 cfl ballasts with 8 38 watt 6500k lights (22,000 lumens total), 2 100 watt hps (19,000 watts), 1 76 watt grow LED ( lumens ??). I have a few questions thought that i'm not quite sure on.... a.) do I have enough lumens? My room is about 30 sqft and I have Rating: 5