The NEBO NEB-HLP-0004 EINSTEIN Rechargeable Cap Light features powerful 50 lumen performance and provides up to 18 hours of operation between charges. Its durable ABS construction and IPX5 water resistance ensures lasting use, while its "Wave Activation" control allows you to easily adjust light mode without touching the cap light. Enjoy the flexibility of three light modes - high (50 lumens), medium (20 lumens), and low (5 lumens) - for maximum brightness and range.