These the right CFL for a 20 long? - The Planted Tank Forum
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post #1 of 22 (permalink) Old 12-25-2012, 08:54 PM Thread Starter
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These the right CFL for a 20 long?

I bought these at lowes but am not sure if these are right for growing plants or even if they are too much without CO2. Right now I have a lot of hair algae because I accidentally added too much fertilizer and I have a DIY CO2 bottle running but don't plant on keeping it for very long.

Should I use these instead of the 14W CFLs I have on there now?





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post #2 of 22 (permalink) Old 12-25-2012, 08:58 PM
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oO Do you plan to have any plants in there?
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post #3 of 22 (permalink) Old 12-25-2012, 09:59 PM Thread Starter
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I am focused a mini pellia covering most of the hardscape. There are small pieces of mini pellia on most of the rocks and in the center is 3 small rocks completely covered in it. There is also marsilea minuta and crypt parva on the left and I might replace the dwarf sag with hair grass on the elevated areas on the right.
I also have some floating plants that cover 1/4 of the tank right now.
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post #4 of 22 (permalink) Old 12-25-2012, 11:51 PM
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well the 5000k will have more to offer than orange lights
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post #5 of 22 (permalink) Old 12-26-2012, 01:00 AM
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if you didn't open the package yet, I'd return them.

I got a 4 pack of the same Ecosmart from HD and 2 out of them burnt out not even a week of use. One wasn't even a day and burnt out.

The Utilitechs I got from Lowes have so far been in use for many months now and were more reliable.
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post #6 of 22 (permalink) Old 12-26-2012, 02:21 AM
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I think 6500 - 6700K CFLs (Daylight or [full spectum??]) is a must-have. I have two 10-watt CFLs over my 10g and, although the conditions of tanks vary, I'm on the edge of algae. A 20 long would be the same height as my 10, and the length I think is 24". So you're working with an extra four inches of length.

I think a 20 with two 13-watt bulbs suspended a little so you've got all the substrate covered would work - certainly 10s because of the same height.

MY TANK: Planted 10g; 2 x 10W CFL; Fluval U2 internal filter; MGOCPM/black sand cap
A Silent Cycled Tank

Last edited by Django; 12-26-2012 at 02:35 AM. Reason: changing data
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post #7 of 22 (permalink) Old 12-26-2012, 05:39 AM
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Go find the 23w ones at Lowes. I can grow almost anything with two of those little suckers.
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post #8 of 22 (permalink) Old 12-26-2012, 06:00 AM
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4x 17 (or 18) watts 6500K's at costco for less than 10 bucks.
I use 1 over a 20H angels breeder tank, grows java moss and amazon sworts.
2 over a 20L with good reflectors prob could grow about anything.

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post #9 of 22 (permalink) Old 12-26-2012, 07:11 AM
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I agree with the 6500-6700k review. That is the best spectrum . I was running 5000k & had nothing but problems + I did not like the way the tank looked!. Since switching to 6500k T-8 2x ( 15 watts each) for my 10 , the tank is doing much better & I have zero algae in my tank. I do not have experience with the cfl , but I prefer the T-8 on small tanks like 10' & 20's.
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post #10 of 22 (permalink) Old 12-26-2012, 07:22 AM
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Save your reciept. Mine burn out all the time. Sometimes the glass bubbles and breaks or the base gets loose and stops working.

But try and get the 6700k version, they are much nicer.
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post #11 of 22 (permalink) Old 12-26-2012, 08:27 AM
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Do not buy ecosmart. 2 of the ones i bought burned out in about a month and 1 lasted a day.
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post #12 of 22 (permalink) Old 12-26-2012, 09:54 AM
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I also returned a two pack in which one burned out out of the packaging. 6500 is the color temp you want for plant growth.

"I am Groot", the faithful protector
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post #13 of 22 (permalink) Old 12-26-2012, 08:46 PM
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Quote:
Originally Posted by shd17 View Post
Do not buy ecosmart. 2 of the ones i bought burned out in about a month and 1 lasted a day.
haha I think thats the brand I did go with and my experience was similar to yours. However there is a guarantee on the box that you can take it back to the place you bought it and get another set. If its Lowes then they offer a lifetime replacment (but its in the fine print and they will give you a new one)

I have gotten lucky with this last set lasting a few months.
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post #14 of 22 (permalink) Old 12-26-2012, 09:21 PM Thread Starter
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So I guess I bought the wrong brand LOL. At Lowes they only sell the ecosmart then the super power saving bulbs that are all 2700k and mostly under 14w CFL bulbs. Where would be a good place to buy bulbs? I will try home depot but I doubt it will be any different.
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post #15 of 22 (permalink) Old 12-26-2012, 10:20 PM
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My home depot has a couple brands in the 6500-ish range. The Sylvania mini-CFL's work really well. I have two 13 or 14w CFL's in brooder lamps over a 20L.
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