Dayblazer 550 lighting set with Dayblazer 65 taillight. Weighing just 60 grams, it's hard to find such a bright headlight that is as sleek as the Dayblazer 550. The headlight features a tool-free mounting bracket that easily and quickly fits handlebars from 22.2 to 34 mm. With a brightness of up to 550 lumens, a lithium-polymer battery, and waterproof according to IP-67 standards, it has a 3-hour charging time via mini-USB and an LED charging indicator. Runtime: Flash mode 1 hour (550 lumens), High mode 1.5 hours (275 lumens), Low mode 5 hours (75 lumens), Pulse/Strobe runtime: 5.5 hours (100 lumens)/12 hours (65 lumens). The Dayblazer 65 taillight features 2 LEDs with 65 lumens of output, a 270-degree visibility, and a unique flash daytime running mode, designed for safety so you can focus on your ride. Due to the slim profile of the unique mount, the Dayblazer 65 taillight can be attached to almost anything you can think of, from round or aerodynamic seat posts to seat stays, a rack, or your backpack. Runtime: Solid mode 1.6 hours (50 lumens), High Flash/Low Strobe 3 hours (65 lumens)/6 hours (35 lumens).