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My build uses 27 of the 10 watt multichip emitters (3 rows of 9) and hanging 6 & 1/2 inches above the water without optics they do just fine (4 foot, 77 gallon Hagen tank). I don't have a par meter & not an sps heavy system, but the coral I have (incl. montipora) is doing as well or better than under my previous MH/T5HO set up. BTAs are looking better than ever as well. Come to think of it, for months I've been underdriving my 10 watt LEDs since it's a somewhat unconventional build using constant voltage power supplies controlled by manual dimming. After doing some current measurements recently, I've cranked up the voltage but still below the 9-12 volt specified forward voltage for the emitters I'm using. IMO it really depends on density (number of emitters), spacing, spectrum, height above water, optics etc. as to whether a certain set up is going to work well for any given tank. That could be 1 watt, 3 watt discrete LEDs or multichips of pretty much any size. The smd LEDs used to make a 10 watt multichip are essentially the same as those used to make the larger multichips. The big boys simply have more of them packed on to the substrate. Your pendants are mounted high with optics, my build is closer to the water surface with no optics. Before embarking on my 10 watt build I also had a look at the larger multichips but was a bit nervous about how the emitters are crammed on to the larger chips. Obviously heat management is key or one of these is going to cook in short order & you're out a few $$$s. The 10 watt multis look to me to be well spaced with only 3 rows of 3 chips in a series/parallel arrangement. Seems to me that they are less likely to self destruct due to a momentary overheat issue, but that's just an opinion, although my set up has been running since April with no failures. A downside to the smaller chips is more wiring, a few hours with the soldering iron getting them all hooked up. Pros/cons either way, but as mentioned there are plenty of ways to make different LED configs work these days with even more on the horizon.
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build http://www.canreef.com/vbulletin/showthread.php?t=82206 Last edited by mike31154; 11-07-2012 at 02:55 PM. |
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Hmm, yeah, I guess that makes sense then. Egg on my face. I assumed since he was quoting seahorse's build that multiple emitters were a given.
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Mike 77g sumpless SW DIY 10 watt multi-chip LED build http://www.canreef.com/vbulletin/showthread.php?t=82206 |
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can 3 of these be retro-fitted into a coralife aqualight pro fixture?
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The group buy closes nov 12th, and there will be 50w and 100w chips, these are all 5 channel chips.
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Current Tank Info: 187 custom reef tank, Running ZeoVit with Vibe, Apex New Gen, Jebao DCS 12000 return pump, custom180 Euro-reef skimmer, running Mazzi venturi and mag 18pump, Lighting-2 60" XHO blue reefbrites , with 8x60" T-5, 2 Maxspect Gyre XF150,and 1Maxspect Gyre XF250 Generator with controller, 120 lbs of Tonga Branch rock, custom sump and manifold |
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Hmm... I want to but Im so scared to mess with my reef. Seems like a very cool project that will make a quality light.
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not sure 50w or 100w. what are the prices? and what else do i need to get these up and running? you can PM me the info if you like.
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