Funny, I was thinking that recently… I have a number of digital watches, all plain LCD… one color LCD. I presume that because lights are used when there’s dark to eliminate, LED indicators are the norm and more recently OLED displays are being implemented. And actually, a nice micro LED backlight to an OLED screen is low enough power consumption to be viable. I expect in the future for multi-mode flashlights we’ll see more intelligent displays. Not just a confirmation of what mode you’re in, but also to show things like inner temperature, battery voltage, and battery charge level.