My DIY 10G light: 2x15W T8 - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 03-29-2010, 02:27 AM Thread Starter
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My DIY 10G light: 2x15W T8



Here it is with the glue drying.

It's 2 18" slim GE light fixtures glued together with strips of wood underneath what you see here. The 4 gray legs are being held with magnets as the glue dries and come from the lid of the almonds jar in the background. I'm going to burn notches into the legs with a soldering iron so they stay put on my rimless tank.

It came out to $28 including the plant bulbs.

It dosn't have room for efficient reflectors but I wanted it to be slim so I'm pleased with it so far. Will this 30 watts of somewhat inefficient light be a good amount for dwarf hairgrass and moss? No CO2, but I will be dosing excel.
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post #2 of 7 (permalink) Old 03-29-2010, 04:04 AM
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You should put mylar in it as a reflectior.

Without a reflector you might not be able to grow DHG

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post #3 of 7 (permalink) Old 03-29-2010, 04:28 AM
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Actually DHG is spreading like a weed in my tank, and grows up so fast, I have to
trim it every week...goes about 4-5 inches.

My setup is Miracle Grow Organic potting mix as my substrate topped with gravel
and 15 W sunlight spectrum and its a 20 gallon.

so 0.75 wpg... and Moss...I wouldnt worry about it... my Xmas moss grows in a jar
on my desk.
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post #4 of 7 (permalink) Old 03-29-2010, 04:54 PM
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What kind of glue did you use to hold everything together? If there is any problem with that design I think it is the glue. Other than that it should work great. And, don't bother with mylar - white paint is a better reflector than mylar.

Hoppy
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post #5 of 7 (permalink) Old 03-29-2010, 08:10 PM Thread Starter
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You were totally correct Hoppy.

I used gorilla glue, which is 100% waterproof, but I see today does not bond this particular plastic well. (the legs held the weight of the stand, but didn't hold up to more than 2lbs of lateral pressure)

Gorilla glue says it won't bond polyethylene or polypropylene.
SO, I am most likely dealing with PE or PP here. I wonder if I should try making different legs or different glue?
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post #6 of 7 (permalink) Old 03-29-2010, 08:43 PM
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Couldn't you some how screw the legs on as well as gluing them?


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post #7 of 7 (permalink) Old 03-29-2010, 09:17 PM
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Quote:
Originally Posted by msnikkistar View Post
Couldn't you some how screw the legs on as well as gluing them?
Screws, especially stainless steel screws, would be a much better way to hold everything together. I think you could do this with sheet metal screws, perhaps 3/8 inch long number 6 screws. Home Depot may have them in Stainless steel. If not, you can use regular nickle plated screws, probably with no corrosion problems.

Hoppy
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