These 98 CRI, 96 Rf 19mm Xicato Zhaga dropins get 98-130 lm/watt: (3000K) and 88-107 lm/w (4000K). But, the 9mm are less efficient, and they don’t appear to make 5mm versions suitable for a torch.
The link doesn’t work.
says the max for 98 CRI is 100 lm/W and for CRI 83 - 137 lm/W.
Sorry, fixed. Performance characteristics starts on page 13: http://www.xicato.com/sites/default/files/documents/DDS%20XTM%20Artist%20Series%20170221_1.pdf
Those are very large COB LEDs. They have a much, much lower power density (W/mm^2) compared to normal power LEDs we use in flashlights. Power density is what lowers efficency and increases throw.
A Nichia 219B-V1 with R9080 shows what LEDs can do with such high light quality.
These COB LEDs are only suited for floodlights.
Mainly I posted about these because they are very high TM-30 metrics, I know they aren’t designed for portable use.
I realize 19mm = 361mm^2 = much bigger than the 12-49mm^2 for the emitters used in flashlights.
I thought 129 lm/w was a good luminous efficacy for high TM-30 Rf and Rg regardless of emitter area, because lumens are not dependent upon angle/area subsumed. But I could be missing something obvious here.
So the maximum 100% luminous efficacy would be an ideal pure green light emitter, at 683 lm/w.
And the maximum theoretical efficacy of white light emitters is ~ 260-300 lm/w, which Nichia researchers have about achieved, albeit at low lumens: White LEDs with super-high luminous efficacy could satisfy all general lighting needs