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Re: Lighting for a 180 gallon.



Consider using two 96 watt AH Supply CF (compact fluorescent) lamps on for
11 hours, and two more on for 4 hours at mid-day. Placed like this:

= =

You'll get almost as good growth, your power bill will be smaller, and the
impact on the rest of the planet will be lessened.

Using two 96 watt CF for 11 hours and two 96 watt CF for 4 hours
2 x 96 x 11 = 2112 watt-hours
2 x 96 x 4 = 768 watt-hours
2880 watt-hours / 180 gallons = 16 watt-hours per gallon

Using three 250 watt MH for 11 hours
(really can't ramp up because they are point source)
3 x 250 x 11 = 8250 watt-hours
8250 watt-hours / 180 gallons = 46 watt-hours per gallon

Using three 175 watt MH for 11 hours
3 x 175 x 11 = 5775 watt-hours
5775 watt-hours / 180 gallons = 32 watt-hours per gallon

I have a 90 gallon that is 24 inches deep, and I run one 96 watt CF for 11
hours and a second one for 4 hours. A 180 gallon is just double that setup.

TW