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Old 03-27-2013, 04:01 PM   #1
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Watts Per Gallon with Energy Saving Bulbs

Hi all,

Quick questions. I was looking at various WPG forumlas across the internet. I am using an energy saving bulb, 6500k for my small 3.2G tank. I only have two Cabomba plants.

The bulb is 5w energy saving bulb, which is reported to be equivalent to 25w of a normal bulb. Which wattage number do I run by here? 5w or 25w?

Also, would 6500k output be sufficient for my Cabomba plants? I just bought a timer, was planning on putting the light on for 6-8 hours. Probably not enough C02 in the tank for anymore. I am not using any carbon injection methods. Would that be ok?

Many Thanks
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Old 03-27-2013, 07:12 PM   #2
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Sorry I meant 6500k colour temperature not output . . .
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Old 04-03-2013, 06:04 PM   #3
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Might anyone have any thoughts on this one?
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Old 04-06-2013, 12:11 AM   #4
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Here is almost all the lighting info you will ever need


http://www.americanaquariumproducts...._lighting.html[/QUOTE]
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Old 04-06-2013, 12:53 AM   #5
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The WPG theory is going out, and PAR is a better measurement of lighting.
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Old 04-06-2013, 01:43 AM   #6
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Yea, you would use the 5 watt per gallon rule, but if your using CFL's it's 1.75 which would make that 5 watts actually equal 8.75 watts for one bulb. Double that if you have 2.
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Old 04-06-2013, 11:29 AM   #7
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Quote:
Originally Posted by foster53 View Post
The WPG theory is going out, and PAR is a better measurement of lighting.
+1 on that and see if you can find t2 fixtures they might end up even replacing t5's plus there small and would fit your tank nicely.
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Old 04-06-2013, 12:38 PM   #8
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+1 on that and see if you can find t2 fixtures they might end up even replacing t5's plus there small and would fit your tank nicely.
If they get much smaller I will need glasses to change bulbs.
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Old 04-06-2013, 12:49 PM   #9
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If they get much smaller I will need glasses to change bulbs.
Haha I know right the t5's are what like 18 mm radius I think mabey 15mm I don't remember exactly but the new t2's are only 7mm radius you could also look into led's I've seen a few websites that carry square or rectangle panels specifically for plant growth.
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Old 04-06-2013, 02:16 PM   #10
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I'm pretty sure that T5HO will be replaced by LEDs and not another type of fluorescent. T2s have been out for a while now and haven't managed to get a foothold in the hobby.
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