Bought this specifically as a sleep-watch; my vision's horrible, I can't even see the big numbers on the bedside LED clock at night, and didn't want to fumble with backlight buttons at 3 a.m. A few seconds of shining my phone's flashlight app directly on the dial before bed, and it picks up the charge and keeps it all night, unlike most glow-in-the-dark watches that lose it all after a few hours. All three hands PLUS the large numerals glow clearly. It's light and comfortable and doesn't interfere with sleeping at all (it's on the large side, and I'm female, but it doesn't matter). Exactly what I was looking for.