Case Study: St. Francis High School Gymnasium (Mountain View, CA)
Application: High Bay Lighting
Saint Francis High School required better lighting for their gymnasium, and also wanted to reduce their environmental footprint.
The existing 400W metal halide lighting gave the facility a poorly illuminated appearance and was costly to operate and maintain. The school’s Facilities Director wanted the gym (which operated 15 hours/day) to be an attractive venue for its teams and decided an LEP solution would address the school’s needs.
470W Metal Halide Lighting
280W LEP Lighting (STA-41-02)
Fits into our strategy for reducing energy, and provides a well-lit facility for our athletes and our fans. Less heat, no noise, more light.
—Tim Houlihan, Director of Planning
- Reduced annual costs by 45% for energy and maintenance ($177/fixture, 3.4 year simple payback on retrofit)
- Improved footcandle levels compared to previous 400W metal halide lamps
- Improved CRI from 65 to 95 providing improved visual acuity and appearance
- Ease of retrofit; able to swap out each luminaire in 15 minutes
- Eliminated noise from MH light ballast
- Reduced environment footprint by 26 tons of CO2 emitted per year (equivalent to the amount sequestered by 5 acres of pine forest)
|Average Fixture Power||470W||280W||190W|
|Number of Fixtures||32||32||N/A|
|Daily Usage||15 Hours||15 Hours||N/A|
|Lamp Replacement Cycle||2 Years||9 Years||7 Years|
|Annual Operating Costs|
|Electricity Consumption (kW-Hr)||82,344||49,056||33,288|
|Total Operating Cost||$12,457||$6,798||$5,659|
|Carbon Dioxide Emissions||64 Tons||38 Tons||26 Tons|