Ethan Frier and Jonathan Ota of Carnegie Mellon University haven't taken their idea to market yet, but the dynamo-powered Project Aura lights look like something that should be available to bikers. These lights require no batteries to work because they are powered by the movement of the bike itself, and idea that seems self-evident after you hear it even the first time.

Vespertine Reflective Belt

VespertineNYC offers not only stylish reflective belts but also scarves, vests, and other clothing items that create a safe nighttime glow. The belts pictured here cost $36, and a scarf will run you about $92.

SpotMe Buttons

Katie Barton’s SpotMe buttons are customizable reflective stickers you can apply to any biking outfit. The embroidery adds a chic touch by day, but at $5 each you may want to try a minimalist approach.

Mini Monkey Light

This Mini Monkey Light is completely customizable, with any pattern or image you can dream up displayed on your bike wheels for creative self-expression as well as incredible side visibility at night.