For safety at night whether on a bike, Segway (if you're lucky), or even on foot, the Flulx Backpack is a great safety device.
The backpack has a built in LED light that illuminates the backpack and draws attention of motorists.
FLUX, the first waterproof backpack with LED lighting, is constructed of a durable 1000 Denier Cordura Nylon exterior and a Tarpaulin vinyl coated polyester lining. FLUX offers you a clean, subtle design during the day coupled with LED powered lighting for maximum visibility at night.
The LED powered fiber optic panel is flexible, waterproof and less than 1mm thick making it just as durable as the backpack itself. The electronics have a run time of 2-5 hours depending on steady or flash and are completely removable and USB rechargeable.
Additionally, the lighting component can also be used as a stand-alone seat post mounted light for trips that don't require a backpack.