dipanp Posted February 18, 2011 Share Posted February 18, 2011 I want to swap out one of three Cree 7up cool white R5 bin XPG boards on my DIY fixtures (to be built) with neutral white per the Aesthetics thread. Rather than spend significant bucks (~$50 per board) on a Cree replacement, could I get away with a neutral white Bridgelux N1203? These are around $26 at Newark. Link to comment
doctaq Posted February 18, 2011 Share Posted February 18, 2011 seems like it would, multi star boards of the same color arent really that useful imo Link to comment
evilc66 Posted February 18, 2011 Share Posted February 18, 2011 The XP-G's watt for watt will be brighter than the Bridgelux. At 1000mA, a 7up XP-G will produce about 2400lm, while the 1203 at the same current is about 1400lm. Granted, the wattage is very much different. Link to comment
dipanp Posted February 18, 2011 Author Share Posted February 18, 2011 seems like it would, multi star boards of the same color arent really that useful imo I have to disagree. For my purpose at least, they are much easier to wire Link to comment
blasterman Posted February 19, 2011 Share Posted February 19, 2011 At 1000mA, a 7up XP-G will produce about 2400lm, At least according to charts I'm seeing 4100k XP-Gs ( assuming you can find the top bins) aren't nearly this efficient and it's closer than you think. Neutral XP-Gs take about a 30% hit over cools, and they don't scale nearly as well at higher currents. Plus, Cree, like Luxeon has been sneaky and throwing in low CRI versions that are brighter simply because they aren't wasting as much energy producing amber. The Bridgelux is a full CRI emitter, which isn't fair to compare to a 70CRI Rebel or Cree that's chopping spectra to yield higher efficiency. I've bickered this so many time over at Candlepower I've given up. 4100k, XP-Gs with a CRI at least 80CRI are around 220lumens at an amp from the charts I've seen. 7x that is a it brighter than the Bridgelux, but not much. The Bridgeluc will likely cost 1/2 as much, but still not be as efficient. A 7-up XPG board using the ANSI / low CRI XPG neutrals will be quite brighter. If you have links to XPG charts showing higher efficiency I'd love to see them. Cree has a Bridgelux competitior in the loop, but I haven't see it although Cutter has a page for them. Link to comment
dipanp Posted February 21, 2011 Author Share Posted February 21, 2011 I might be able to use this. Thanks guys. Next important thing is reflectors/optics. I'm planning on trying 25 and 40 degree reflectors on most of the primary light sources (cool white XPG, royal blue and blue XPE), but will probably mount the fixture high and use 25 degree. Anything available in 25 to 40 degree range? Saw this at digikey, it says for 1200 series, but not specifically listing the N1203 emitter: http://search.digikey.com/scripts/DkSearch...ame=711-1083-ND Also, I could have sworn I saw a thread on a high power fixture that Clive built and possibly testing for nanotuners using four of these emitters and surrounded by RB's. For the life of me I can't find that thread. I tried searching for "bridgelux" but couldn't find it. Is it still around? Link to comment
cloons411 Posted February 21, 2011 Share Posted February 21, 2011 Is this the thread you are referring to? http://www.nano-reef.com/forums/index.php?showtopic=257668 Link to comment
Machupicchu Posted February 21, 2011 Share Posted February 21, 2011 http://www.nano-reef.com/forums/index.php?...20&start=20 ^jerk^ Link to comment
doctaq Posted February 21, 2011 Share Posted February 21, 2011 that thing would be insanely bright at 40 degrees Link to comment
dipanp Posted February 22, 2011 Author Share Posted February 22, 2011 That's it guys, thanks!!! Looks like the same reflector too, I think ... Link to comment
evilc66 Posted February 22, 2011 Share Posted February 22, 2011 Those are the same. Just remember that the stated angle is only half the emission angle. The 25 degree reflectors I used are actually 50 degrees. Link to comment
dipanp Posted February 23, 2011 Author Share Posted February 23, 2011 Those are the same. Just remember that the stated angle is only half the emission angle. The 25 degree reflectors I used are actually 50 degrees. Thanks Clive ... Are Ledil the only ones that do that? Hope so ... Link to comment
evilc66 Posted February 23, 2011 Share Posted February 23, 2011 Yeah, they are the only manufacturer that does this. Not sure why. Always check the datasheets though, as there might be some other anomalies out there. Link to comment
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