Smart Exterior Lighting Initiative (Bi-level Lighting) Dr. Michael Siminovitch Professor, University of California, Davis Director, California Lighting Technology Center Associate Director, Energy Efficiency Center

Midnight: Six Cars in Structure

UC Davis: Smart Exterior Lighting Initiative All exterior light points will reduce automatically to 50% or less power upon vacancy and increase automatically to 100% upon occupancy.

Main Energy Saving Strategy Bring Right Light –Light Sources Luminous Efficacy Correlated Color Temperature (CCT) Color Rendering (CRI) Where Needed –Luminaire Optics Luminaire Efficacy Application Efficacy And When Needed –Adaptive Controls Astronomical Timing Photo Sensing Occupancy Sensing

Exterior Lighting: Significant opportunities to save energy through adaptive bi-level controls. Parking lots Parking garages Path way Signage

North Entry: 2/3 installed

Sacramento State

“Smart” Bi-level Extends life Enhances security ~50% savings

Smart Bi-level (~60% savings) ($50 added cost <1 year payback in new construction)

Campus- wide Retrofit

Smart Lighting Initiative Case Study: South Entry Parking Structure, UC Davis

Smart Lighting Initiative By 2020, all exterior lighting will use adaptive controls

Costs and Payback Periods HPS baseline SourceCost ($) Payback (yrs) Street & Area LED Induction Parking Garage LED Induction Linear Fluorescent