CFL Lighting: what is the general wattage that people use on a 10 gal tank? 11 " H - The Planted Tank Forum
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post #1 of 19 (permalink) Old 03-20-2013, 01:22 PM Thread Starter
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CFL Lighting: what is the general wattage that people use on a 10 gal tank? 11 " H

I have two 10w CFLs over my tank, right on the glass tank cover. I'd really like to know what wattage people are having success with. Thanks

Steven
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post #2 of 19 (permalink) Old 03-20-2013, 01:30 PM
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the response to your question would depend on what kind of light you're trying to achieve.

with that said, i highly recommend reading this sticky article: PAR Data-Spiral Power Saver Bulbs, lighting question

many people ask the question that you ask now and i hope the thread will be as informative for you as it was for me.

my specs are:
23W 13inches from bottom of tank, pointed directly down. This would be around med light. i have co2, AS, and it's on for 7 hours right now.

i just restarted my planted tank so i need to see what the right setting is based on my layout and etc - personally i think it's a learning process tank by tank case until you really nail it down to a science.
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post #3 of 19 (permalink) Old 03-20-2013, 01:30 PM
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Hey Django,

I use a home made setup with 2 CFL's 15W for my 36 gallon corner. Everything is going well. I salted the tank a bit and the Cabomba didnt like it, but not the lights fault!

If you have the space on the top of the tank go to HD/Lowes and get 2 of the Chromed tin "clamp lights" take the clamps off and set them right on. Easiest, most reliable lighting you will ever get away with.

Make sure to use high spectrum lights, typically CFL's are all pretty "daylight" anyhow
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post #4 of 19 (permalink) Old 03-20-2013, 02:04 PM Thread Starter
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I'm just trying to get the plants to respond. I had 1 10w CFL on the tank until very recently - now I have two and the cyanos and string algae have not gone into overdrive.

I'm very tempted to just stick on 13w x2, but I had an algae problem with that before. The tank is 10 gal with 2-3" substrate.
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post #5 of 19 (permalink) Old 03-20-2013, 02:14 PM
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10w is just right.
15w - med light
23w - high light
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post #6 of 19 (permalink) Old 03-20-2013, 04:40 PM
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I have 40W of 5000K CFL over a 10g shrimp tank. Everything is going pretty well with minimal algae. Can't quite get the hairgrass to really spread at the substrate so I'm guessing its low light down there. Light is ~2ft from substrate. I have floaters.
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post #7 of 19 (permalink) Old 03-20-2013, 04:46 PM
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40w is to much light, no co2, low fert = no grow.
Algae will take over.
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post #8 of 19 (permalink) Old 03-20-2013, 04:55 PM
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Quote:
Originally Posted by In.a.Box View Post
40w is to much light, no co2, low fert = no grow.
Algae will take over.
But he mentionned the lights are 2 feet over the tank. That must reduce the light a lot.

Michel.

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post #9 of 19 (permalink) Old 03-20-2013, 05:15 PM
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i have a 26w 6500k CFL siting on a versatop lid over my 10g. it offers medium/high light

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post #10 of 19 (permalink) Old 03-20-2013, 06:08 PM
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Quote:
Originally Posted by In.a.Box View Post
40w is to much light, no co2, low fert = no grow.
Algae will take over.
You cannot generalize lighting. Every setup is different. If you recall, I also said that I have floaters which reduce the amount of PAR that makes its way to the plants below.
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post #11 of 19 (permalink) Old 03-20-2013, 09:48 PM
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Re: CFL Lighting: what is the general wattage that people use on a 10 gal tank? 11 "

2 x 19w 18" above substrate 10hrs
AS and no co2

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post #12 of 19 (permalink) Old 03-20-2013, 09:53 PM
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40w is still to much light. I use 26w on my 75g with full cover duckweed and still gets med light.
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post #13 of 19 (permalink) Old 03-20-2013, 09:56 PM
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42w, co2, heavy plant mass, foot above tank, 7hours a day, no algae besides some gsa. But I did have to move it up because thread algae was starting to appear when it was 5inches above the tank.
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post #14 of 19 (permalink) Old 03-20-2013, 09:56 PM
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Lets agree to disagree then.
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post #15 of 19 (permalink) Old 03-20-2013, 10:20 PM
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Sounds like a perfect time for a dance off

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