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What Wattage metal halide light should I get ?
Im looking around at metal halides at the moment and have gone into a few
hydroponic shops to check some out. I was just wandering what wattage I
should get. The choice I have is between a 175W and 250W one - they are
basically the same price.
The globes in both are 6700K (is this ok for planted tanks?). My tank size
is a 50 gal (or 200L) tank. The 250 would give me 5w/gal and the 175 would
give me 3.5w/gal ? Would it be harder to keep the 250 because the tank would
become more unbalanced more easily ??
Any advice help would be appreciated