Exposure Trace & TraceR with DayBright. This is a wonderful set ideal for a commuter in need of a powerful yet compact front and rear light to give you the ultimate protection for cycling amongst the hustle and bustle of other cyclists Convenient. The lights only weigh 93g and are extremely compact to make sure that they are easy to transport when you are not on your bike. The lights can easily be recharged while on the move with both lights coming with USB recharging cables that can be plugged in and charged via your work computer, your smartphone charger, or anywhere else that there’s a USB port available Features. Front light has a 110 lumen outputRear light has a 75 lumen outputRun time of up to 24hrsLi Ion 700mAh battery4hrs charge timeDimensions: 57mm x 28mmWeighs 93gUSB rechargeableBuy Exposure Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.