Nitecore T4K Keychain EDC Flashlight, 4000 Lumen LED Super Bright and USB-C Rechargeable with LumenTac Keychain Light - - Amazon.com
Yes They Finally Did It... 4000 lumens In A Thumb Sized Light! - T4K First Look | 🔥 Yes They Finally Did It... 4000 lumens In A Thumb Sized Light! - T4K
Nitecore T4K flashlight straps 4,000 lumens to your keychain