Lumen Output: Boost - 2000lm - 2.00hr Mode1 - 1750lm - 2.30hr Mode2 - 1100lm - 4.30hr Mode3 - 120lm - 43.00hr FL1 - 100lm - 200.00hr Steady FL - 200lm - 98.00hr Day FL - 400lm - 260.00hr Some of the best features include: VLS – Variable Lumen System. Set my lumen allows you to set any lumen you would want. Simply press & hold the VLS button Matrix LED System – Making the operation easier Waterproof to IPX 5 Lumen and Run Time are tested under ANSI FL-1 Standard Daylight Flash Mode – Making a cyclist more visible during the daytime Light Memory Mode – Stay on the same mode even when you turn the light off Lock Mode – Protect your battery and prevent accidental turn on