The Planted Tank Forum - View Single Post - ODNO measurements: power consumption vs light output(LONG)
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post #12 of (permalink) Old 09-29-2005, 10:37 PM Thread Starter
shalu
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I would like to add one more comment on ballast factor. Based on my measurements above and going through ballast specifications, I realized one general fact about ballast factor for multiple bulbs: the ballast factor drops as more bulbs are connected, meaning each bulb will get less power/light. Take the Advance 4x ballast I used. When all four bulbs are connected to the ballast normally, the ballast factor is 0.88, about 28w each. When one bulb is connected(other leads from the ballast are free), I was getting 40w, or BF=1.25. Connecting 2 or 3 bulbs result in something in between(at 3 bulbs, BF=1.0 according to ballast spec).


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Flourite, wet/dry, AHSupply 302w PC, PinPoint controller

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15w T6+15w T8

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40w T6 ODNO4x, no CO2. Discus grow out.
10gallon Tonina tank, 2x15w T6 ODNO 4x
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I will do aquascapes after I collect all the plant species and grow them to perfection.
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