The NiteRider Lumina 950 Boost Bike Light provides enough light that it can be used in just about all riding conditions, whether it be on the road, on your favorite mountain biking trail, or hand-held in Walk Mode. Specifically designed to meet the needs of riders in all cycling categories, the Lumina 950 Boost features an all new Boost Mode light setting. Simply double click the power button, giving you the option to operate your light at maximum light output!.Perfect for helmet mounting (Helmet Mount sold separately).IntelliChargeTM - Reduce charge time in half!.Convenient USB rechargeable.Low battery indicator.Handlebar Mount.Lumen Output: 950.Run Time: 0:40 - 18:00hrs.Quick Charge Time: 2:30hrs at 1Amp.Normal Charge Time: 5:00hrs at 500mA.Weight: 172g.Battery: Li-Ion.