I bought this flashlight 2 years ago and, although I have 2 other brands with much higher lumens, I prefer this light for EDC. It never leaves my side. The 500 lumen output is plenty bright for most of my applications, though I find that I use the low mode more often, for closer operation, reading, etc. The light has proven to be rugged, reliable, and the clip allows for a deep pocket ride. Also, I can rest the light on the tail cap, to illuminate the ceiling/room, when the power goes out. BUT,I quickly switched from the included Streamlight USB battery to one from Orbtronic, because the micro-USB chargeable battery had SUPER flaky operation. So much so, that I initially thought the flashlight was problematic...when battery was removed to charge, I had to play with tail cap to get it positioned "just so", to work again...even then, getting it back on was not guaranteed. I had already purchased a 3500 mAh battery from Orbtronic (no USB-micro port), so I threw that in and "TA-DA" - my flashlight operated perfectly, no matter what I did when removing and reinstalling battery. Also, when used with 2 CR123 batteries, it had flawless performance, as well. So, I ditched their glitchy battery and haven't looked back. I can't say enough good things about this Streamlight flashlight, and feel 100% confident in its operation...especially with a proper 18650 battery or CR123 batteries installed.