further…
15.2W x .85 = 12.16W (passing through the driver assuming its 80% efficient)
12.16W / 3xml = 4.05W/xml
4.05W / 3.4Vf = 1.19A per emitter
1.19A ~ 460 lumens from each xml “(from this thread here)”:Results: Testing XM-L, MC-E, SST-50, and XP-G emitters **Updated**
460L x 3 = 1380 bulb lumens
Factor in reflective losses + refractive losses + bezel obstruction I would expect output to be around 1000 Lumens OTF. Possibly less OTF if the deep bezel blocks more side spill than I suspect. Possibly less OTF if its a spring floating design with no thermal path, although at this low of a drive current I would not expect it to warm that much… definitely not enough heat to initiate thermal dimming on a cold start.