The CYCL WingLights as so they're called will provide ample light to show cars where you are on the road and which way you're turning. Each one is powered by 2 x Cr2032 batteries that are included, and they say they last for up to 6 months depending on usage.
The CYCL WingLights install easily onto most standard handlebars with an inner-diameter between 14.9 mm and 22 mm. Once the base is installed, you can then easily snap the lights on and off the end of your handlebar to prevent them from being stolen. They snap on and off using magnets and when removed, the units clip together to form a key-ring on a caribiner for safekeeping.
