Amazon.com : Light & Motion Vis 180 Aero Adaptor Bike Light Accessory : Sports & Outdoors
Aero seatpost light mount - Slowtwitch.com
Gaciron 15 Lumen Bicycle LED Rear Light for Round and Aero Seatpost LED Bicycle Rear Light - China Bicycle Taillight, Bicycle Tail Light | Made-in-China.com
Rear light for aero seatpost? | Rear bike light, Bike lights, Urban bike