LED lighting

SAN FRANCISCO--Each year, the West Coast Green show plays host to many companies hoping to turn what are currently considered alternative technologies into a new, greener standard for home building. This year's show, which runs through tomorrow, features everything from solar window shutters to efficient, nontoxic piping, and greywater collection systems.

Many of the products and technologies here are designed to be integrated into existing home architecture, making current homes greener and more energy efficient.

This is a colorful--and highly efficient--LED lighting display being shown off at the conference.