US Patent 7794103 Parking space barrier block with photovoltaic illumination

A solar-powered parking space barrier block is configured as a one-piece molded housing of a high strength, transparent plastic material in which a photovoltaic solar panel and a DC energy storage module are inclosed. A pair of white light LED lamps provide end panel marker illumination, two yellow light LED lamps provide hazard warning illumination and a rechargeable supercapacitor storage module provides operating power. A power control circuit enables use of the solar panel as a photosensor to automatically energize the LED lamps when ambient skylight falls below a predetermined safe visibility level, and removes operating power from the LED lamps when ambient skylight rises above a predetermined safe visibility level.