Knog PWR Commuter 450L. The PWR Commuter is a premium light with an elliptical beam and 450 lumens of light output for fantastic visibility and the light also comes with a USB power bank allowing you to charge your iphone on the go Power Bank. The light is fully USB rechargeable which makes charging easy while on the go. The USB port from where you charge the light also has another handy use – it can be used to charge other electrical objects. While cycling and still using your light you can also charge your GoPro, navigation device, cycle computer, iPhone etc. For example 1 hour of riding at 250 lumens while your phone is plugged in to the charge port will top up your smartphone by 10%. There is also a battery indicator on the side of the light to make sure that you don’t lose power while on the go.5 Modes. The light comes with 5 different light modes to suit your changing environment or battery life. These include:Ride: 450 lumens – 40mins battery lifeCommuter: 190 lumens – 2.5hrs battery lifeStamina: 50 lumens – 7hrs battery lifePulse: 320 lumens – 2.5hrs battery lifeStrobe flash: 190 lumens – 3.5hrs battery lifeEco-Flash: 50 lumens – 35hrs battery lifeYou can extend the number of modes by connecting the light to Knog’s ModeMaker App to update and add more modes to your light. You can connect to the app via the USB port. This gives unlimited options to personalise the setup of your bike light Features. 450 lumens maximum output98x30mmWeighs 85gBattery light indicatorUSB rechargeableWater resistant when cap is onBuy Knog Lights from Chain Reaction Cycles, the World’s Largest Online Bike Store.