FW3A, a TLF/BLF EDC flashlight - SST-20 available, coupon codes public

[contactcr]

@Agro

The peak current of FW3A won’t be 1.05A per emitter but significantly more. At higher currents the efficiency gap will be larger when comparing both LEDs at the same current.
Furthermore SST-20 actually has lower Vf than LH351D so it will draw more current. This will make the efficiency gap yet another bit larger, but it will reduce the brightness gap slightly.

vF a lot closer than you think when comparing both in high CRI. The LH351D has much higher vF in the 70CRI model but the 90CRI is a different beast.

From maukka:

LH351D 5000K 90CRI @ 4A
3.4x vF
1189 lm

SST-20 4000K 95CRI @ 4A
864 lm
3.43 vF