Coral response to high lighting

[saltyfilmfolks]

Which one do you have? Where can I get it? They are cheap, right? Send me a model number. I do not need another $500 meter, but if they are cheap, I will see if I can get one this week. We have no smog or stuff in the air here... which I would think is similar to Hawaii... dunno about The Whale's Vagina.

I do not expect that a hobby grade meter is all that accurate... nor that they will scale from device to device, but I got 1300-1500 PAR under 2 feet of water in Missouri in the summertime (older meter that needed the correction factor). There is something different about the readings. I do expect that this same meter when used on different light sources can at least give us a reasonable ratio from one to another.

https://www.amazon.com/dp/B00LSFR0F...t=&hvlocphy=9061183&hvtargid=pla-505585159192

Stands up to my $500 one
https://www.reef2reef.com/threads/lighting-upgrade-with-a-lux-meter-saltyfilmfolks.248417/

Devide by 54 in the sun.
https://www.apogeeinstruments.com/conversion-ppfd-to-lux/

 

[oreo54]

It is on my Apogee 510. I did not get 3k today, but almost. Here is 1:00 today in Colorado... in winter... not as close to the sun as we will be in a few months. 2864 PAR. Apparently, there is a "but load" more here at altitude, but still would like to know a number.

Don't you need to divide that by 1.32 (water correction factor)??

2166.............

Earlier one.. 1895 not 2502-ish...MUCH more believable..

FOR my own correction.. Trying to verify PPFD losses by altitude.. Isn't showing that it as extreme as I thought.. So my apologies on this one.. May spend some more time on this later..
A mile of air does have an effect on solar radiation but if this calc is right.. VERY minimal. Like 5 Watts/meter sq
http://fuzzo.com/science/RadData.htm

Keep in mind and AFAICT that's "all" radiation not just the PAR band..

To convert W/meter to "photons" i.e PAR (also assuming they are stripping out "not PAR" wavelenghts):
http://www.egc.com/useful_info_lighting.php
4W/meter is 18PAR..

 

[jda]

You are probably right. The answer is there somewhere.

I imagine that the air quality matters a lot, as well. We have very clean/clear air here... as does Cancun. No so sure about Cali, but Hawaii should have good air as well.

That is still a lot of light over every square inch of water in a tank and not just some hotspots. I will still hold onto my thoughts that I have not seen a LED yet that can do that... only 10+ bulb T5s and strong MH on big reflectors since the have power and spread. I can get 1200+ PAR under the surface over every square inch of tank, but that is using 10k Hamilton on m80 and a big reflector - this is too much for some smoothies up hight, but they are fine down low. I can get over 800 par with a Radium 20k on M80 in the same reflectors.

 

[oreo54]

What you are talking about is design not LED's....
How many >500W small diode (>3W) lights have you seen?
Not going to get into spectrums at this point.. just raw PAR power..
Yes LED's are mor point light sources and as such need different considerations..

 

[jda]

Just the AcroOptics is high power that I have ever seen.

Of course design matters. I don't light tanks with theory and potential.

The BRS guys really trash on caustic lines on this one... I cannot think that I have ever heard this as an issue from a MH... I will have to think on this and if I think that it is a real issue.

 

[oreo54]

Just the AcroOptics is high power that I have ever seen.

Of course design matters. I don't light tanks with theory and potential.

The BRS guys really trash on caustic lines on this one... I cannot think that I have ever heard this as an issue from a MH... I will have to think on this and if I think that it is a real issue.

Just take enough of these to cover the top..
No "theory" needed....................

Each one is equiv to 1 T5ho (pretty sure that is conservative).............Start w/ your 10

only 10+ bulb T5s

It's cost not tech..................$1899.50

go ahead change the bar again........