• The Ledlenser SEO7R is a lightweight, technology-rich headlamp. Powered by a lithium-ion rechargeaable battery pack and only weighing a bit less than 3.5 ounces, the SEO7R puts out 220 lumens. The patented Advanced Focus Systems lets the user transtion between a broad flood beam or a sharply-focused long distance beam. Optisense Technology autmoatically adjusts the light output to fit the ambient conditions.