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Old 12-10-2002, 04:49 AM
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StirCrazy StirCrazy is offline
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Default Been a long time sence we had a lighting fact thread

Well I have some more test results. they are not from my tank but rather a person's tank that will remain un named (unless he wants to be knowen) anyways on with the Data.

Ushio 400 watt 10000K MH running on a M59 ballast
Left Bulb
12" = 402 PAR (7" air and 5" water)
27" = 146.49 PAR (7" air and 20" water)

Right Bulb
12" = 347 PAR (7" air and 5" water)
27" = 154 PAR (7" air and 20" water)

ballasts were changed to Son Agro ballasts
Left Bulb
12" = 555.21 PAR (7" air and 5" water)
27" = 316.1 PAR (7" air and 20" water)

Right Bulb
12" = 501 PAR (7" air and 5" water)
27" = couldent test at 27" this time because coral placement was shading the bottom.

as you can see there was a substantial increas in intensity and also the visual color was more white and more intense.

My plan is to take at least the 12" reading once a month and see how the intensity drops off over time.

Steve
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