Head- and tail lights definitely help make bicycles visible from the front and back, but what about from the sides?
The handlebar-plug-replacing SideLights are designed to address that shortcoming, plus they serve as headlights, tail lights and turn indicators. The Swiss designed setup aims to make getting around at night as safe as possible for all riders and consists of two aluminum-bodied light modules which slide into either end of the handlebars, then get locked in place to prevent theft. They're compatible with almost any type of flat bar.
The protruding LED section of each module has an amber turn indicator and a white headlight on the front, an amber turn indicator and a red tail light on the back, and a ring-shaped amber turn indicator/running light on the side.
The indicators are activated by a bar-end button on either module, which the rider can push without removing their hand from the grip. They automatically shut off after 20 seconds, or can be manually stopped sooner by pressing the button again. Everything is powered by a rechargeable batteries that are said to be quick and easy to remove.
Assuming the SideLights reach production after a successful Kickstarter, a pledge of 89 Swiss francs (about US$102) will get you a pair. The planned retail price is around $190.