Excellent work Hank, and I have a challenge for you!
Cree has announced a new breed of XP class emitters, the XP-L! With 23% brighter output, this looks very interesting. See if you can be the first to offer these little beauts! (3 of those on a triple Noctigon would be supremely impressive!) These are rated at 3A capacity, and with 460 lumens at 1A minimum for the top V5 bin, can you imagine a trio driven well? Yowza!
Thanks in advance for all your effort and dedication, you’re very much appreciated!
I am wondering if this 219B is even more efficient than Cree XP-G2 of the same color temperature.
I was discussing this with Boaz in PM, and I report here:
Nichia 219B (NVSL219BT): If 350mA = 149lm at 25°
CREE XP-G2 R4 5A2 (XPGBWT-L1-0000-00GE4): If 350mA = 147lm at 25° (130lm at 85°)
Nichia 219B specsheet here
CREE XP-G2 specsheet here
5A2 tint or any other tinting is irrelevant as long you want to know the brightness of R4 (brightness bin). You have around 270lumens at 700mA, 3.06V (According to CREE PCT). With D220 you have around 230lumens at 700mA, 3.09V (According to Nichia datasheet). But well both are typical values, not minimums or maximums.
New 80CRI Minium in stock is XP-L U5 7A3 80CRI Minimum.
Also XP-L V4 3D 4750-5000K, nice neutral white. Same Kelvin temperature as the 3C tint but slightly less greenish. http://intl-outdoor.com/led-xpl-c-107_141.html