DIY CHEAP Led Downlights Ramp 190 Gallon HELP - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 07-16-2019, 08:34 PM Thread Starter
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Exclamation DIY CHEAP Led Downlights Ramp 190 Gallon HELP

Hi everyone!
I'm gonna start up a new low-tech 190gallon/720l tank. (200x60x60) The ramp I got when I bought this used aquarium was no good so I was thinking about building my own. The plan is to use an mdf-board as a ramp, spraypaint it and carve-out holes for LED Downlights. Then Im gonna attach it with metal-wires from the roof and have it floating over my tank. I'm planning on using 4 of these LED downlights. 18 watts, 6500 Kelvin and 1020 lumens each. So a total of 4080 lumens (4 lamps) dispursed over 2 meters.




However, I'm totally new to this and never done this kind of build before so could appreciate any advice. Remember it's for a low-tech plant whit a few Anubias, Java-ferns and other low demanding plants. I'm only focused on getting a good strong natural light that will bring out natural colors and make it easy to see my fishes.
Some of my concerns:
Will it be dangerous from an electrical point of view? Considering moist and water and that I won't be a waterproof ramp. (I will use glass cover)
Will the lumen output be enough?
Is this kind of light-model optional for Aquarium ramps?

Check out the pictures, hope I made everything clear. Thank yall!
/Qumulus

Webpage to the downlights (It's in Swedish though) https://www.lampornu.se/ledvance-led...saettare-2x18w
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post #2 of 4 (permalink) Old 07-16-2019, 08:53 PM
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LED watts is 12 each.. 80-89CRI... 85L/watt..48w total
That's tiny over a 120gal tank..even low tech..

My guess is you should shoot for at least a total of 100 led Watts..

Think you'd be lucky to get 60PAR at the water surface..
much less anything worthwhile at 60cm...

Second thing, and personal.. I dislike MDF. Use real plywood or a plank..

find something like this in a decent K range...
https://www.1000bulbs.com/product/20...LT-10773B.html

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Last edited by jeffkrol; 07-16-2019 at 09:02 PM. Reason: edit
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post #3 of 4 (permalink) Old 07-17-2019, 11:12 AM
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I second not using MDF, it disintegrates in water/moist environments. Which means the only thing keeping your lights together would be that coat of paint. Much better to use real wood or a thick piece of decent quality plywood.

But unless you are really tied to the down light idea. I would consider using LED tubes in a shoplight fixture. They are designed to be hung exactly the way you want to hang them. They also come in a variety of price points allowing you to do really excellent lighting or just low lighting. You can even mix in match temperature of the lights.
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post #4 of 4 (permalink) Old 07-17-2019, 03:55 PM
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Tanks almost 80" wide.. tubes have a hard time w/ that footprint though 3 2ft fixtures are fine..
Problem comes in w/ the end butt.. overlap is weak..w/ real florescent not quite as bad as led flourescents..
Filling it in means raising means more room spill/light in tank loss.
Got to start staggering tubes ect..

down-light is a good idea.. finding the correct lights/lens geometry height is the tricky part.

suspending a 72" Beamsworks is also good..
https://www.amazon.com/Beamswork-FSP...260136011&th=1

Buy on Amazon.com and ship to Sweden

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