Gas exchange

[Aquarist007]

As this post is in the Advance Forum, I'll respond. I have read many articles concerning light and corals. All were much more advanced than the link referenced. Really..."here's some readings from a guy"... What was the spectrum of the light used? What type of glass was used: plate; tempered; low iron; etc.? I could go on.

PAR is not the last word on light quality. PAR is the measure of all photons in the visible light spectrum. Photons mostly in the blue end of the spectrum are used by corals for photosynthesis. Even if the number listed in the link is accurate, if the 12% loss consists of photons in the blue spectrum there could be issues, particularly if lighting is marginal before the loss.

I'll stipulate there's no real reason to worry about spectrum loss with LEDs that are heavily weighted to the blue end anyway other than wasting energy. It's even less of an issue on small tanks that are easy to light. However, a 12% loss could be substantial when lighting a large tank.

Thanks for posting this. What I learn on the advanced and chemistry forums I pass on to many others on other forums. I guess I'm like the reef central Ebola knowledge virus:eek1:

 

[codyreed29]

Lol well thanks for all the input. I was moving to a new location to start setting up tanks and broke the glass on my fixture under the 250 mh now I can look at it in a good way I might have just gained 12 percent par LOL.