LED lighting for 25g cube (Walstad) - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 06-16-2015, 12:29 AM Thread Starter
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LED lighting for 25g cube (Walstad)

Hey all,

I'm trying to decide on lights for my 25g Walstad cube. The tank currently has Monte Carlo in a DSM phase, using 15" 2x20 t5 lights, bulbs are 10K. This will too strong once I flood, plus it's bulbs sizes cant be found everywhere.

The tank is 18x18x19. I other than the carpet of Monte Carlo, I will plant heavily with what I have on hand hygros, pennywort, rotella, anubia, crypt. I plan on picking up some floaters for the flood. I want to keep this MC carpet low and healthy and am hoping to get some emergent growth from my hygros as I have in my other tank.

Substrate is mineralized organic potting soil. Cap will be Flourite Black. I do not plan on adding any ferts, carbon or pressurizing this tank.

The room will get some ambient sun but no direct light.

I was going to follow Walstads instruction and use a 6,500k and wide spectrum t8, but wouldn't mind spending a little more for a sleeker and more efficient LED.

Based on my reading, I want the bottom of the tank to be between 20 and 30 par, since I have a carpet growing - I should be to the higher end of the range.
Would a Finnex Stingray 20" do the job? How about beamswork? I haven't had much luck finding par ratings for beamswork. Should i look for a 6,500 bulb for my 15" t5 and just run one bulb? I am open to other suggestions within that price range.
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post #2 of 6 (permalink) Old 06-16-2015, 04:31 PM
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Par ratings are here for those fixtures you listed. They are all good choices. https://www.plantedtank.net/forums/sh...d.php?t=875457

75 gallon planted low tech
10 gallon quarantine planted low tech
5 gallon planted (sons) low tech
Plant heavily, fertilize well, stock lightly, change water weekly, and most importantly do not use too much light.

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post #3 of 6 (permalink) Old 06-16-2015, 06:06 PM
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You may not get enough spread from front to back with those LEDs, have you considered a large dome reflector with a CFL?
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post #4 of 6 (permalink) Old 06-17-2015, 12:35 AM Thread Starter
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Originally Posted by Jcstank View Post
Par ratings are here for those fixtures you listed. They are all good choices. https://www.plantedtank.net/forums/sh...d.php?t=875457
i read the thread, those are 30" which i imagine have higher par ratings. Thanks you
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post #5 of 6 (permalink) Old 06-17-2015, 01:06 AM Thread Starter
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You may not get enough spread from front to back with those LEDs, have you considered a large dome reflector with a CFL?
I did consider this, thinking 2 smaller domes with 13w CFLs. Id probably start them right above the top and raise if needed. Does this sound right?
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post #6 of 6 (permalink) Old 06-17-2015, 06:05 PM
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Check out ikea FOTO pendants, they take CFL and look much nicer than the Home Depot lights. I paid 15$ cdn each. I run 3 on my 40b with 23w CFL in them.
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