Those modes sound almost perfect, though I’d suggest making the two middle modes slightly higher. Like, 0.2 lm / 5 lm / 32 lm / 100 lm.
How bright was the room when those pictures were taken? A 0.2 lm mode is only for use in very very dark places… It’s fairly common, when someone turns on a light in moon mode during the day, that they won’t realize it’s on without pointing it at their face.
I have a couple brass 18650 lights which are about 20.5mm * 97mm, and some brass AA/14500 lights which are 17mm * 76mm. So, those are both possible. They’re not as detailed though, the body accents are shallower, the switches aren’t recessed (only flush), and they don’t have any diameter difference between head and body.