If it’s a floody beam, 1-2lm shouldn’t hurt night-vision, as intensity is less, being more spread-out.
If it’s throwy, just the opposite.
And sublumen should then be more properly be called “firefly” instead of “moonlight”.
Me, I prefer moonlight over firefly, as I’m mostly looking for stuff on the floor or just walking in pitch-blackness, vs checking a map or watchface.
In my GTmicro, which runs Narsim and is about as throwy as you can get, I configged “moonlight” (shortcut press’n’hold from off) to 1, the lowest, and a fractional-second longer for “floor”. So I can choose between firefly and moonlight depending how long I press from off.
So maybe something like that… press’n’hold shortcut can take you to firefly first (eg, 1sec) and jump to moonlight after (eg, 1½sec).
Not disturbing others sleeping, keeping dark adaptation for eyes, reading maps, looking inside bag at night or other close-up tasks where even 1-2lm can be harsh and too bright. The <1lm modes on the M150 and H04 is one of their best features and something that makes them really stand out from many other competing lights at similar price.
Some situations require a better preservation of night vision.
Here’s a UI idea on managing it.
Activate moonlight.
Click, Click+HOLD — shifts moonlight to next intensity. 0.3 lm, 0.5 lm, 1 lm, and 2 lm are the levels. After 2lm, intensity resets back to 0.3 lm. Whatever intensity you had set your moonlight, it will be recalled anytime moonlight is activated. Another idea would be if you do click, click+hold and continue holding, for each 2 seconds it steps up to the next intensity until 2 lm, then resets after that.
M400 needs a recessed button switch that is easy to find in class complete darkness. The M300 switch is so small and very difficult to locate in the dark.
I just see this post and might be too late, but I’d like to see a cooler temp like 5700K-6000K option with a nice tint/CRI. Many lights offer popular LEDs only in neutral-warm white (5000K and under). If M150V3 had 519A in 5700K, I would have bought it (I own one M150V2 with CREE LED just because LH351D was too warm).