SPI Lighting is an independent, privately held company headquartered in Mequon, Wisconsin. With its state-of-the-art office, components manufacturing and assembly facilities; SPI is equipped to meet the requirements of almost
any lighting project.

In the mid-1970s, SPI pioneered the use of HID lamps for indirect lighting. Since the company's current owners took over in 1987, SPI has emerged as the recognized leader in high-performance ambient illumination.

The addition of Advent Lighting in 1999 further strengthened SPI's offering in the architectural
lighting market.