I've talked up Surefire's Guardian before. It's my go-to travel light, especially on the (admittedly rare) occasions when I fly and don't check a bag. It's a one-light solution that gives me everything from a wide, even 15-lumen MaxVision beam for finding my way to the loo between tent pegs and camp chairs at Paul-E-Palooza to shining a conventional, focused 800-lumen spotlight on the tree line across the lawn at Castle Frostbite.
Even if I have my regular EDCL2-T along with me, the honkin' big internal batteries on the Guardian save wear on the pocket light's CR123s. I also liked that it could theoretically be used to juice up a dead phone or other USB accessory...
I say "theoretically", because I did inadvertently discover one weakness. While it claims to use a "USB-C" connector, it's a variety of USB-C that matches no other connector in Roseholme Cottage. Having not used it since SHOT back in January, I pulled it out of a traveling jacket pocket to find it was flatter than the Texas Panhandle and I couldn't find the cable. No other cable in the house, not even on the numerous squids, fit it.
It's going to be in the camera bag pocket I use for other critical cables from now on, ensuring that I always know where it's at, as well as making sure it comes with when I travel.
