UV effectiveness on SPS

Yeah, I agree with FOD. The idea of using optics on UVs makes me nervous, exactly for the same reason he's stated.

 

I hadn't seen the 398nm led's. The ones in the plug-n-play Rapid kit are 410-420nm. I was just going to set them in to supplement the blues and whites.

 

Rapid LED does not carry UV, but 420nm which is Violet color.
I am using UV from Aquastyle. It looks ok to me.
Epileds LED 3W violet(UV)

LEDgroupbuys carries UV, but I do not recommended.

I think it is better to use optics on UV as well because it will increase intensity. The beam angle without optics is around 120degree. I think it is too wide and not to have enough intensity for UV. Also, UV light is not good for human eyes.

 

Is there that much of a difference between the 398nm above and this 410-420nm? Wavelength is only off by 22nm at most.

LEDs - Violet UV LEDs - Rapid LED

 

One is known to cause cancer in the state of California. Stick with the 403nm and up.

 

When I first argued the effect of UV light with "lighting professionals" two years ago I was told that I didnt know what was best for my corals and that I was straight out wrong.
I have been running UV light since then and can personally attest as to how good it is for corals. I am just happy now that my theory is becoming more mainstream and that the results are evident so that one day the "lighting professionals" will see that I was actually the right one all along.
Thank you

 

I believe it has different. Except white or similar LED, LED just has one peak spectrum. It means it does not contain enough intensity on the certain spectrum. If you use both 400 and 420nm LEDs, it will cover much wide spectrum range.
You can refer the Cree data sheet below. This is just an example, but Blue and RB spectrum are very sharp graph.
http://www.cree.com/products/pdf/xlampxp-e.pdf

 

But I live in Florida...

Just kidding. I think I'll stick to the 420nm... Thanks FoD!

 

Not by much, since its only 2 months, but the ripened color is there.

12/28/2011


2/23/2012


The green is more obvious, dont you say?

 

The "real" test will come when my build is done. I have a slimer that is so green and it sits directly under a 150W 14K Phoenix. If it can hold the uber bright green after the switch to all led (w/ true violet in the actininc, deep red and turquoise in the daylights) we'll have further evidence of the importance of a wider spectrum.