How many LED lights for 60cm tank

clint24

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16 Mar 2008
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Bromley, Kent
Hi to all.I have a open top 60l x 33w x 35h about 63 litres.I currently have a arcadia overtank with 2x24watts T5.I am thinking about getting the new aquabeam led lighting,but not sure how many aquabeams i need to have to get the same or more amount of watts.Could any one help.Cheers
 

scottturnbull

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30 Oct 2008
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According to the manufacturers two units would give the same output as 2 x 24W T5s. The problem is the light distribution, especially at the water-surface. Close to the LEDs, the light-beams are narrow. If you want good coverage, from top to bottom, three units would probably do better. The distribution problem can also be helped by raising the units higher above the tank.

This is what the light-spread from one aquabeam looks like, suspended approximately 4 cm above a Juwel Rekord 70 (60L x 30W x 40H).

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patchy%20front.JPG


As you can see, the light fans out, providing greater coverage at lower depths.
 

Themuleous

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6 Jul 2007
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Aston, Oxfordshire
Interesting photos, not seen the LED's over a tank before, very interesting to see the vary narrow beam they produce. Worth knowing that is.

Sam
 

clint24

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16 Mar 2008
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Location
Bromley, Kent
Cheers Scott sorry for delay.Thanks for the photos,I see what you mean about the beam. I was going to fit them into a overtank luminare which is about 3 inches above the tank.Hopefully it should spread the beam out more.What sprectrum are you using Scott.
 

scottturnbull

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30 Oct 2008
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clint24 said:
What sprectrum are you using Scott.
I'm using Marine White. The others produce a striped appearance. If you use either 'natural daylight', or 'full spectrum', it might be an idea to alternate them, to produce a checkerboard appearance. Or just use Marine White.

I meant to update this thread. I got another strip yesterday. While fitting it, I noticed the original strip was a little too close to the front glass. (I have it attached to the service flap on my tank). I rotated the service flap so the strip was now closer to the middle of the tank. You can see the effect two strips produces on my journal.

If you install yours into the Luminaire, two should probably be okay. George Farmer did the same thing. That's where I got the idea of using Marine White.
 

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