i think my cob du jour is the next size up, the 1825
$43
@5000K 70CRI:
>160 lm/W @140W
>170 lm/W @ 85W
>190 lm/W @ 50W
hard to beat those numbers. got the 3590DB by the balls at high power
Yeah I mentioned that in the "other cobs" thread I think. Even at 3500k 80 CRI and Tj=65C the 1825 stays above 160lm/W at 100W.
On paper, the Crees are dust at high wattages, and the 1212 and 1825 are definitely the sweet spots for cost or high watt efficiency, respectively, I think the CXB3070 makes more sense under $30 vs the 1818 at low currents.
Cree bins, however, and that still kicks ass. Citizen, Nichia, Bridgelux, they just state typical flux, with a minimum and/or maximum range.
Here is an extreme example from Nichia, from digitized graphs:
NFDLJ130B 3500K CRI 80 Ta=25C
6210 - 7610 lumens @1150ma 39.2 Vf 45.08W 138-169 LPW
3273 - 4010 lumens @545ma 36.2Vf 21.27W 154-189 LPW
If Nichia binned you'd have a CXB3070 killer for $10. This degree of worrying about photons generated is limited to plants, rand crazy flashlight people as far as I can tell, and Cree definitely caters to the, ahem, enthusiasts.
@JorgeGonzales awesome thread, amazing clean simple light! its very cool to see you break the Vero / Cree mold. I was actually going to PM you last night and ask if you could find the time to do a little write up on Citizen's offerings. I know there is a lot of discussion about them in the "COBs other than cree thread" Since you are pretty well informed about them, do you think you could do a post with a little rundown on their offerings, what the product codes mean, binning etc.
cheers man.
Thank you my friend.
I can try to write something up, although now that you opened that can of worms with the "subforum changing the world" thread, it shined a glaring, duh moment light on how crippling it is not to be able to edit/curate top posts with the up-to-date information around here. There was no good explanation given, and "just ask a mod" to edit posts, update images, all that crap, is a poor excuse for a solution.