Re: Moddoo Customs: Triple CREE XP-E (reservations open)
The estimated XP-G relative luminous flux @930mA is about 2.35.
The R5 bin has an upper flux limit of 148 lumens @350mA. That gives about 350 emitter lumens @930mA. Thus, a triple XP-G R5 could have a max output of about 1050 emitter lumens. If, however, you run the drop-in for a long enough time for it to get hot, junction heating could reduce the output by 20% (assuming the graph in the datasheet of relative luminous flux vs junction temp @350mA holds for 930mA). That could reduce the max lumens to about 840 lumens.
On top of that, the Carclo triple optic has an efficiency of 88.7% for the narrow optic (87.2% for the medium frosted, 80% for the wide frosted; no numbers in the datasheet for the narrow frosted, but you would think it would be at least as good as medium frosted). That might cut the max output to about 740 lumens for a hot drop-in. On startup when the drop-in is still cold, you could get about 930 lumens out, before junction heating kicks in.
The triple narrow optic is also rated at 9.8 candela per lumen. For my triple XP-E R2 driven at 700mA per LED, the calculated min output per LED is just about 200 lumens. That would put the triple beam intensity at about 6000 Cd, or 6000 lux at 1 meter. In fact, I measured 6100 lux at 1 meter with a "cold" drop-in. The agreement could be just dumb luck.
Assuming things hold for the XP-G, you might get about 10,000 lux at 1 meter for a cold, triple XP-G R5. Not bad.