2022 · The 500 Lumen Nitecore TINI 2 Lumen USB-C Rechargeable Keychain Flashlight utilizes a total reflective optic, packing a lot of brightness in a small container. It is far and away the best and brightest keychain flashlight we have ever used. It will light up an entire room, and is brighter than a number of our inexpensive AA LED flashlights.