Proper spectrum?

[chrisfont23]

Originally Posted by Ron Reefman

chrisfont23, just to be absolutely clear, it was 2smokes that said corals are iridescent. Not me.

The quote in your post makes it look like I said that. But that was because 2smokes did a poor job of quoting me and, adding his own comments and running it all together. Not your fault, but I just want it to be perfectly clear that I NEVER said corals are iridescent!

Doh! Somehow the 'open quote' never got closed. I was quoting the following post on 10/26/2016 at 5:12PM made by "2smokes":

Your corals don't need true UV. MH fixtures use glass that blocks UV. Only a small amount of UV penetrates water very deep on the reef. Why all the concern about UV? I have MH bulbs that can tan your skin in a few hours.UV penetrates the water and its an important part of the spectrum.Corals are iridescent because they evolved to reflect UV light.Corals on reef are blasted with high ammounts of UV .

My bad.

[2smokes]

This is iridescence Corals arent iridescent.Was a mistake i did when i called them iridescent.I was thinking at ctenophores.

[dz6t]

Originally Posted by Walla2GSP

Are you sure about that statement?

https://www.thorlabs.com/drawings/94...-SpecSheet.pdf

I think the statement should be:
Majority of the LED fixtures on the market do not produce significant amount of light with wavelength below 400 nM.
On the other hand, there is no solid evidence that wavelength below 400 nM is critical or even important to the coral we keep.

[Ron Reefman]

Originally Posted by dz6t

I think the statement should be:
Majority of the LED fixtures on the market do not produce significant amount of light with wavelength below 400 nM.
On the other hand, there is no solid evidence that wavelength below 400 nM is critical or even important to the coral we keep.

Well said.