This is the 10M Angel Tears in full RGB beauty.

A strand of LEDs as close as we've seen to droplets of light.  You can weave it through your clothes, your hair, your bike, or anything your choose. Practically weightless and otherwise invisible, Angel Tears will give any project an ethereal quality.

Each single-color strand is 10 meters long (~33 1/3 feet), with 100 LEDs spaced every 4".  It runs off DC 12 V using a pre-soldered barrel connector.  Each strand comes with a free plug & play input connector and an 8AA battery cage