Exterior Lighting Retrofits
In May 2013, CSUSB began a project to retrofit exterior lighting fixtures and controls on both the San Bernardino and Palm Desert campuses to a state-of-the-art energy efficient system. Equipment installation was completed February 28, 2014, followed by commissioning to verify operations and to fine-tune the scheduling and dimming programs.
The project replaced over 1,765 exterior high-intensity discharge (HID) lamps on parking lots and structures, roadways, pedestrian pathways, and over 690 wall pack security lighting units on building exteriors, to light-emitting diode (LED) fixtures.
These LED fixtures are DesignLights Consortium® (DLC) qualified with digital dimming ballasts and wireless controllers at individual fixture- or pole-level.
All of the LED fixtures were rated at a 4000K color temperature, the closest to natural moonlight. This allows for improved visibility for pedestrians and security, while meeting Dark-Sky guidelines to reduce light pollution for night sky observation and to neighboring natural spaces and their nocturnal habitants.
New LED lighting in front of College of Education in contrast to HID lighting to right along Health & Physical Education Complex. Photo by Corinne McCurdy, CSUSB Creative Media Services.
Controls and Load Management
The EXERGY® Digital Exterior Controls system provides a secure remote connection for scheduling, dimming, emergency and conservation event alerts and reduction settings, as well as energy demand, energy usage, and maintenance reports.
The advanced scheduling also allows for the system to gradually “ramp up”, “fade in”, or “dim in” to avoid costly start-ups during On-peak electricity rate periods.
Daylight scheduling is primarily set to astronomical twilight by an atomic clock, with input from a global ambient light sensor to adjust the on/off and dimming schedules each morning and evening to local lighting conditions. In addition, the two parking structures on the San Bernardino campus utilize distributed local motion sensors to further adjust lighting up to full brightness only as needed during dark hours, perimeter lights are left off during daylight hours, and daylight dimming of individual fixtures by location is adjusted with input from the global light sensor.
The controls system provides American National Standards Institute (ANSI) utility grade rated metering for energy performance measurement and verification. On March 15, 2014, the system began archiving electricity demand and usage data at a controller unit level.
All scrap materials were recovered for recycling, including regulated lamps and ballasts handled in accordance with EPA requirements.