Easy to install wireless LED brake light strip attaches to helmet. Comes on steady when brakes are applied; after 5 seconds the LEDs flash. Has button for continuous blinking emergency display.

We're pretty impressed by this one ...

Imagine if you had some magic glowing beads, that would emit beautiful colors without any wires tangling them up. They exist, in the form of wireless induction-powered LEDs, and [Debra] of Geek Mom ...

Wireless LEDs. That’s what [Scotty Allen] found in Japan, and if you find something you just have to replicate it. [Scotty] found these wireless LEDs in a display stand for model makers and gunpla.