Give yourself and fellow road users extra assurance by using NiteRider's TL 5. 0 Rear Safety Light during day or night rides. Tiny but powerful, the light emits up to ten lumens to help alert motorists to your presence on dimly lit roads and during traffic filled commutes. For this year's model, NiteRider added amber lights to the sides of the TL 5. 0 to provide you with 180 degrees of visibility. You'll have the option of one steady and four flashing modes, and the light will last for up to 100 hours per set of batteries.