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Unread 09/11/2017, 08:54 AM   #13
lingwendil
Man who sold the world
 
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Join Date: Oct 2004
Location: Oakley, behind enemy lines in communist occupied California.
Posts: 254
25 lagoon? What are the measurements and intended livestock? You would probably be good with SPS but it depends on the height.

Quote:
Originally Posted by perkint View Post
What makes you say that? Generally the XP-G3 is better than the XT-E. Cree haven't added the XP-G3 RB to their product comparison tool (last time I checked) and their own info isn't hugely explicit, but suggests:
XT-E up to 600mW at 85°C
XP-G3 up to 680mW at 25°C

Tim
What are the numbers of the XP-G3 at 85°C? Probably a more realistic comparison, but it should still be pretty close.

I'm a LumiLEDs guy when it comes to royal blue, personally, but the Crees have the advantage of taking more current, so I don't mind them when available.

Just as an experiment, my next array will be based on either a Vero 10 4000k 90CRI or the Citizen 4000K 97CRI, with two Cree regular blue, a Rebel Cyan, Rebel Lime, and a Luxeon K16 royal blue, with 2-3 violets. A couple of these clusters should easily be good for a pretty good rig over a 12x24 footprint or even over maybe 18x36 depending on what is meant to be kept. Four over a standard 55 gallon would probably be a great budget rig for most anything other than highly demanding SPS unless kept up high.

The Luxeon K8 or K16 is a great choice for royal blue, but it's no longer being produced... Still worth grabbing a few, you can get the K16 (which can dissipate 45w!) For $5 each on FleaBay and Aliexpress, and cheaper if you buy 5 or 10 at once.

Something like that might be good if you want a small footprint, less emitters, but it steps into the territory of advanced skullduggery, and may not sound as Gucci to all the snobs.



Last edited by lingwendil; 09/14/2017 at 11:37 AM. Reason: Edit
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