I work some odd hours so I generaly spend half an hour in the morning and one or two at night at the fish tank. So at the moment my tank lights are running from 6:30 to 21:30, 15 hours in total and if I get home after 21:30 I still switch the light on to feed them and relax for 1/2 hour. The question is has anyone tried splitting the cycle in two i.e. let the lights stay on from say 5:30 too 11:30 then back on at 17:30 till 23:30. What effect would this have on the fish ect. The live plants should not be affected, they would get their 12 hours, my algae should be less and I could see the tank whan Iam at home.