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Best Buy - Skylights & Dimmable Fluorescent Lighting in Conjunction with Enterprise Energy Management System

  • Skylights with dimmable fluorescent lighting 
  • Skylights with dimmable fluorescent lighting 

SKYLIGHTS & DIMMABLE FLUORESCENT LIGHTING IN CONJUNCTION WITH ENTERPRISE ENERGY MANAGEMENT SYSTEM

Showcase Project: Best Buy

Location

Las Vegas, NV

Project Size

41,000 square feet

Annual Energy Use

Baseline
(2009)
116 kBtu/sq. ft
Actual
(2013)
95 kBtu/sq. ft

Energy Savings:

18%

Annual Energy Cost

Baseline
(2009)
1
Actual
(2013)
.75

Cost Savings:

25%



Background

Before skylights, dimmable lighting and the Enterprise Energy Management system, Best Buy had 400 watt metal halides and no immediate way of knowing if the lighting or heating/cooling systems were working as designed.

With its high solar insolation and energy conservation potential, Best Buy selected this Las Vegas store to receive a multi-faceted energy upgrade.

Solutions

Best Buy installed skylights and a dimmable fluorescent lighting system to harvest daylight. Adding skylights allowed Best Buy to vary lamp output from 5% to 100%. On average the daylight harvesting system reduced lighting energy use by 45% in the store. Best Buy also installed sub-metering for lighting in the store, which allowed the creation of alarms and energy models to ensure proper lighting schedules during unoccupied hours, employee-only hours, and store hours.

Other Benefits

Allowing more natural light to come into the store enhances the overall customer and employee experience, especially on a sunny day. The enterprise energy management system creates alerts when critical equipment is in alarm which allows Best Buy to be proactive and ensure that issues are fixed before the customer and/or the employee experience is compromised. Other benefits include reductions in carbon footprint and reduced repair and maintenance expense at the store.

Outside the Las Vegas store

Solutions

The skylights installed by Best Buy were Sunoptics, Prismatic Skylights, and the size used varied based on structural design. Complimenting the lighting and skylights additions, a corporate energy management system deployed at the store employs automated fault detection and diagnostics, to alert energy management staff if equipment is not running according to schedule or there are significant problems detected in critical equipment.