Nichia 119 series specs?

[dan.towner]

Hi all,

I have just come across the Nichia 119-H1 warm white (http://www.ledrise.com/leds/high-power-leds/p664/nichia-nscl119-h1/), which reckons on 126lumens/watt at 350ma. This seems dramatically better than something like a warm-white XP-E which is 76 lumens/watt according to the specs. Is there really such a big difference in efficiacy? I can't find a data sheet for the Nichia anywhere to be able to confirm or deny this.

thanks,

dan.

 

[uk_caver]

The figures on that site don't make sense

Nichia High Power LED, NCSL119-H1, Emitter, Warm White, 170lm, 120°

262lm @ 700mA, 210lm @350mA

126lm/W@ 350ma, 101lm/W@ 700mA luminous efficiency

the later figures (262lm@700mA, etc) have presumably been copied from a page like http://www.ledrise.com/leds/high-power-leds/p663/nichia-nscw119/ where the device does claim to be 262lm in the title, rather than 170lm.

Also, the 262lm@700mA and 210lm@350mA don't even seem to square with the 126lm/W and 101lm/W figures, and don't make sense without incredible efficiency at 350mA and shockingly bad droop.

 

[blasterman]

Nichia's Page on the emitter.

 

[zzonbi]

Again, best in class numbers, but where are these actually sold? (they're listed available... btw nice thermal drift)