I'm a welder by trade, and I often use flashlights to inspect my work. I've used a bunch of Maglite solitaires for a while, but I'm getting a little tired of how fast they gunk up or burn out. Turns out, welding work is ROUGH on flashlights, especially if you keep using them through grinding and polishing. What I'm looking for is a small, very durable flashlight. Preferably under 1" in diameter, between 3 and 5 inches long, and very durable with regards to heat and abrasive, conductive dust. Ideally, I'd like something usb-c rechargeable, but without some kind of dust flap for the port I don't see how that's possible. The other problem I tend to have with the maglites is that I end up melting the plastic cover over the bulb. That let's in dust, burning out the element. The front cover would probably need to be something other than plastic. Replacing the solitaires isn't the worst thing in the world, but it's a pain in my ass to forget to buy more and end up burning out the last one when I need it. I don't need anything particularly bright, just indestructible.
I agree with the Zebralight suggestions. I own way too many lights and the Zebralights are not the ones I use most often, but they are the toughest of them. They are also very efficient, which not only conserves battery but reduces heat generated. And they are thin compared to most other lights in the same class.
Zebralight offers high CRI versions of its models, which I recommend. The technical details are kind of complex, but basically the light they produce makes it easier to see and differentiate colors.