Light for a 20 gallon tank?
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Old 12-07-2011, 11:16 AM   #1
Jonas
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Light for a 20 gallon tank?


Hello all,

Im starting with my second planted tank soon and now i have to chose a light source.

The tank will be 60 x 30 x 36or40 cm something like that.


I am now looking at these 2 lamps.

The first one is from Arcadia:

Arc Otl Freshwater T8 60Cm/2X15Watt.



The second one is from Ferplast: (and is about 80 dollars cheaper than the arcadia)

Ferplast ARCLIGHT 2X15W T8.


Anyone here with experience and/or knowledge about these 2 lamps?

All other suggestions are welcome of course.

Thank you.

Edit: i just found both lamps at around the same price on a website. So the price is not going to make a difference in the dicision making.
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Old 12-07-2011, 12:21 PM   #2
jmrmotorhead
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To be honest, I would look into work lamps with cfls inside. Many members including myself have gone this route in an effort to save a decnt amount of money and have found them extremely effective and afordable. Check this link out for more information:
http://www.plantedtank.net/forums/li...-solution.html
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Old 12-07-2011, 01:34 PM   #3
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I will look into that, dont know yet, the design is important to me.

Now for another question: (2 actually)

I began looking at 2x 24 watt t5 lights but i was told that it would be a bit to much, however i'm now running a 30x30x35 nano with 2x11 watt pl lights from dennerle.

Can i compare the 30x30x35 nano tank to a bigger tank (60x30x40) or would that be unrealistic.

Second question, Will i be able to grow light demanding plants with the 2x15 watt? im going to try a carpet in the the bigger tank and i want it to stay low of course.
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Old 12-07-2011, 02:06 PM   #4
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I would check out the charts in this thread
http://www.plantedtank.net/forums/li...t5-t12-pc.html
and compare your tank height (bulb height) with the chart and see what light would work best for you. Since I do not have any experience with lighting other than cfl's I cannot tell you for sure which would be best, but that thread will help.

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Old 12-07-2011, 02:09 PM   #5
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One of the problems we are probably facing is that you are in Europe and most of the posters here are in the U.S. or Canada, so the two lights listed are not ones that we see for sale here.

I currently have two 29 gallon tanks, one has a t5ho fixture with two 24 watt tubes. It is not a high priced fixture and does not have good reflectors, so the lighting is fine. I have been able to grow plants well, without an algae problem. The fixture is a Current USA Nova Extreme. It is a 30" fixture but takes the same bulbs as in a 24" fixture.

On the other tank, I have t5no's (branded as Aqueon, but the same as the older Coralife t5no's). I have two fixtures on that tank with two 14 watt bulbs in each for a total of 56 watts of t5no light. That tank is also doing well without an algae problem. Again, these lights have poor reflectors.

Reflectors make a huge difference in a fixture. If a fixture has a good quality reflector a lot more light reaches the tank.

You can always buy the fixture you want and if you find the light too high you can reduce it by using a piece of window screen attached to the plastic protector over the light bulbs.
I don't know if this helps at all, but just my experience.
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