LightSKIN LED brompton bicycle seatpost with tail light. 0.875 lb, 0.375 lb | eBay
Light system for easy retrofitting: LightSkin's LED handlebar and seatpost tested — urbanbike.news
Lightskin (LED Seatpost) // White (27.2mm Light Diameter) - Base Urban Bikes - Touch of Modern
Brand-X LightSKIN Seatpost Light | Wiggle
epicbike — LightSkin seat post with LED rear light Φ30.8mm - black
Seatpost with taillight built in. Accessory blast from the past. Found while on craiglist. https://newyork.craigslist.org/que/bik/7565099330.html. Called LightSkin, sold around 8 years ago, Powered by 2xAA batteries. https://youtu.be/eIy8tK50S3Q Found ...
Builtin light seatpost – LightSKIN
epicbike — LightSkin seat post with LED rear light Φ27.2mm - Black/White/Silver
Review: Lightskin Seatpost light | road.cc
Light Skin Seatpost with 5 LED's StVZO - ø 31.6 mm - Black | Seatposts | BMO Bike Mailorder