I carried a Fenix RC05SE every night for my last three years working.
Fenix RC05 SE Rechargeable Flashlight - Fenix Lighting
It's 4 inches long, .75 inches OD and 450 lumens. It has a built in recharger that uses a USB cord so you can recharge it almost anywhere. I've had it for six years and haven't had to replace the battery. Fenix says the battery is good for 500 recharging cycles and it has a 5 year repair Warranty
I actually sent a Fenix Light in for warranty repair once. I had it back within a week and the light they sent was an upgrade.
FWIW I did a "survey" of every cop I ran into at work for a month or so (CSPD,EPCSO and UCCS campus cops) every single one of them carried some kind of Surefire. I thought that was significant until I found out the only Police Supply store in town
only carries Surefire products.