I don't know if this will help, but a real world example of the 1.1 lux on an SF L1:
A few weeks ago I went on a long night hike with a buddy. I clipped my then-new L1 RD on my cap's brim and used it as a headlight w/ an F04 beamshaper (diffuser). I used it the entire night, spending 90% of the time on low (1.1 lux). To my night-adapted eyes I found it was more than enough to illuminate the trail in front of me. What was most interesting was it seemed that the amount of red light was enough to illuminate my surroundings yet not interfere with my night vision. But when I blasted it on high I could really tell the difference in output and effect upon my eyes.
I really was surprised to read it was rated at 1.1 lux on low!