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Old 12-11-2019, 09:26 PM
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Default Light Frosting

I saw Spectral Designs is doing lights for that new vivarium company In Situ. They opted for some frosted piece in front of the LEDs. The benefit I assume is the light dispersal and you’re not blinded if you look up. Those are animal problems though. I’m inclined to put those first before all my plants.

Thoughts on lightly obscuring the light intensity?
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Old 12-11-2019, 09:40 PM
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Default Re: Light Frosting

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Originally Posted by DPfarr View Post
I saw Spectral Designs is doing lights for that new vivarium company In Situ. They opted for some frosted piece in front of the LEDs. The benefit I assume is the light dispersal and youíre not blinded if you look up. Those are animal problems though. Iím inclined to put those first before all my plants.

Thoughts on lightly obscuring the light intensity?
I use SD panels on my 36" x 18" x 36" -- 2 strips with 3 built-in spots which I'm quite happy with; best viv lights I've had to date.

They're *very* bright and I don't think using frosted glass would degrade their efficacy all that much, but I have yet to try. One test would be to use diffustion film and measure the foot candles or lux to compare light levels before and after -- but that's not quite the same as PAR and I don't know what diffusion film would do to alter the coloured wavelengths of light meant for plant growth. Needs more research when I have time.

I use a custom cut/drilled glass top on my tank; Maybe something like these:

https://www.decorativefilm.com/plain-light-diffusing

...will improve the look and soften the light. I'm not so worried about the frogs because by the time I introduce any into the tank, I should have plants grown in sufficiently to provide some light dappling and there's cover built into the hardscape; but cutting glare wouldn't be a bad thing.

I'm still looking into all this while my plants grow in.
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Old 12-12-2019, 12:17 AM
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Default Re: Light Frosting

Been contemplating the same issue with my new, very bright light on the top rack. I have black borders blocking the LEDs, but when viewing up close you can see the LEDs and they are blinding.

You could experiment with leftover egg crate. It's also called light diffuser. I'm currently out.

I think any opaque material would degrade light intensity and wouldn't be good for high light plants like bromeliads. Another reason egg crate might be the solution since there are physical holes in the diffuser I'd imagine it wouldn't affect intensity too much.


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Old 12-12-2019, 01:50 AM
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Default Re: Light Frosting

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Another reason egg crate might be the solution since there are physical holes in the diffuser I'd imagine it wouldn't affect intensity too much.
There is data on this from the reefkeeping community. It is 15-20 years old, and difficult to track down (some is only in printed form).

Here's one thread I found on a quickish search:
https://wamas.org/forums/topic/26776...ocusing-light/

Dana Riddle did tests on every lighting permutation imaginable, but a lot of it has disappeared over the years, or I can't easily find it, anyway.
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