From First Street Online:
This brilliant Lighted Umbrella incorporates 3M reflective material and a “6V” Krypton bulb that casts a 6’ circle of light when illuminated to insure your visibility on a rainy night. Can be seen from over ¼ mile away. It’s tested to withstand strong winds and gusts without any damage, and it’s virtually unbreakable in normal use.
Bulb included. Buy one here. It’ll be $30.