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chewieee
11/11/2007, 07:14 PM
Anyone have a site that shows the difference in PAR on different light bulbs like T5 PC etc...

atvdave
11/11/2007, 10:27 PM
here's one for T-5's

http://www.reefcentral.com/forums/showthread.php?s=&threadid=918935

jcltok
11/13/2007, 06:47 PM
By the way, the sun produces 1800 microMols/2m/sec of PAR. So the fluorescents at 200 to 350 PAR are a little low compared to 1800.

HecticDialectic
11/13/2007, 07:23 PM
<a href=showthread.php?s=&postid=11176793#post11176793 target=_blank>Originally posted</a> by jcltok
By the way, the sun produces 1800 microMols/2m/sec of PAR. So the fluorescents at 200 to 350 PAR are a little low compared to 1800.

Is that 1800 at 10 feet or 30 feet below the water?

hahnmeister
11/16/2007, 05:17 PM
<a href=showthread.php?s=&postid=11176793#post11176793 target=_blank>Originally posted</a> by jcltok
By the way, the sun produces 1800 microMols/2m/sec of PAR. So the fluorescents at 200 to 350 PAR are a little low compared to 1800.

Disregard this post. He doesnt know what he is talking about.

Those T5 readings are plenty strong. Those readings are done at a standard distance (18" or 2'... I forget), and without reflectors (so the light field is as close to 'radial' as possible.

That '1800' number he has been posting around the forums isnt even correct, and its a completely meaningless number to us.