The Swift(TM) 500 gives you more than enough lumens at our lightest weight for headlights (82 grams). NiteriderA(R) makes this headlight USB rechargeable for convenient on-the-go charging. The Swift(TM) 500 features a highly durable light housing with DupontA(R) Fiberglass reinforced nylon meeting all required FL1 Standards for impact testing and dust/water resistance. FEATURES a Lumen Output: 500 a 5 Modes with Run Times: 1:40-32:00h a Charge Time: 2:00/3:15h a Low Battery Level Indicator a Weight: 82g a Water / Dust Resistant IP64 Rated a USB Rechargeable TYPICAL RUN TIMES a Low - 10:00h at 150 Lumens a Med - 3:40h at 250 Lumens a High - 1:40h at 500 Lumens a Flash - 12:30h at 500 Lumens a Walk - 32:00h at 30 Lumens