I like the UltraFire Wf501B lights alot. There's always one on my nightstand next to HD gun as well in travel bag and car. Always!! I have a few others but like these the best. Has a Cree T6 led, hi/ lo & strobe with memory in all modes. LiThium ion 4.2 volt 4200ma battery that never seems to run down. I also have a couple of the 501's single mode hi , with pressure pad for rail mount weapon lights.
High grade aluminum, water resistant, with tactical bezel. Blinding bright. I'm guessing around 500+ lumens