starsbravo New member Mar 11, 2006 #1 How long should I leave my metal halide lighting on for during the day? What should be the day to night ratio?
How long should I leave my metal halide lighting on for during the day? What should be the day to night ratio?
B bertoni Premium Member Mar 11, 2006 #2 I light my tank for about 9 hours a day. That seems to work well enough for me.