Patterson Brothers Lighting in Lakeside has held a C-10 electrical contractor license since its 1986 incorporation, specializing in lighting systems and electrical infrastructure from Riverside Drive. The company's scope spans commercial and residential lighting fixture installation, a C-10 discipline shared with Tokai Electric Inc in Alpine, though Patterson Brothers concentrates on illumination-specific systems. DIR registration places the firm in the top 12 percent of California's 54,000-plus public works contractors, with documented project history across San Diego and Imperial Counties. Large-scale fixture and wiring projects in commercial tenant improvements coordinate with motorized access systems provided by Easy Open Door Company, Inc. on Woodside Avenue. Public works engagements include medium-voltage electrical distribution, integrated automation lighting controls, and fixture specifications compliant with California Title 24 energy efficiency standards.