Lezyne Hecto 40L / Femto STVZO USB Light Set Combining a powerful front light with a maximum output of 40 lux/140 lumens and a rear with 270-degree visibility, the Hecto 40L / Femto STVZO USB Light Set will ensure you can see and be seen all winter long. Both feature a tough construction and a long run time to get you home safely and with better visibility. Front Features: German StVZO optimized lens Up to seven hours of runtime Durable, heat-dissipating CNC machined aluminium construction Versatile strap fits most handlebar shapes and sizesWeight: 114g Rear Features: German StVZO optimized lens with up to 270° of visibility Lightweight and compact co-molded construction IPX7 waterproof rating Versatile, secure mounting strap Micro-USB rechargeableWeight: 23g Front Runtime:Blast: 40 Lux/2 hours 45 minsEconomy: 15 Lux/ Lumens/7 hours Rear Runtime:Blast: 8 Lumens/4 hoursEconomy: 4 Lumens/8 hours Buy Lezyne Lights from Chain Reaction Cycles, the World's Largest Online Bike Store.