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Old 01-16-2012, 01:59 AM   #1
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24 3W LED's over a 20 gal tank

I am ordering LEDs from rapidled.com and I was wondering if 24 LEDs would be enough to grow SPS
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Old 01-16-2012, 02:17 AM   #2
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would be more then plenty for a 20g plenty
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Old 01-16-2012, 07:11 AM   #3
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I'm thinking of doing LED over my new 10 gal, How do you figure what driver you need?
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Old 01-16-2012, 09:07 AM   #4
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Any constant current driver will need 12 leds to prevent damage . Dimmable drivers can use less but to maximize the led 12 is usually a ball point figure and them being 3 w each
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Old 01-16-2012, 09:34 AM   #5
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Rapidled sells drivers that drive down to 3 leds
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Old 01-16-2012, 12:39 PM   #6
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Quote:
Originally Posted by Jereli View Post
Rapidled sells drivers that drive down to 3 leds

exactly and you can adjust the voltage and currents that are being pushed through them meanwel drivers
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Old 01-16-2012, 12:52 PM   #7
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But how many do u need to grow SPS
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Old 01-16-2012, 12:58 PM   #8
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one LED per 16-18 square inches of surface area. over a 20g all you really need is about 20 but the kit comes with 24 and you can always switch if you decide to go to a larger tank
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