Yup yup a couple seconds in the sun lights it right up. The lume is weak compared to say, my seiko divers, but even when it hasn't seen light in hours, I.e. when I wake up at 2am or whatever, the lume is visible in the pitch black of my room, to my darkness adjusted eyes. So it does the job!
Sadly I fucked around and fogged it, so it does have a limit to its water resistance. A couple hours in the sun in a bowl of rice with everything open seems to have dried it out, now I'm reaching out to some folks to get it properly waterproofed.