Not all of these lights have firefly/moonlight modes, unfortunately, and for a very small (coin cell) light, 1 lumen would take a significant amount of power. It is also a lot of light, maybe even enough to be annoying. If you are night adapted, 0.1 lumens goes a long way.

Would you want it just to be able to find the light? A GITD marker that you charge up in the daytime or with the high mode would work better.

It looks to me by eyeball like the Litezall's low mode is about 50% of high mode, but I haven't measured.