This report summarizes an assessment project conducted to evaluate light-emitting diode (LED) luminaires with bi-level operation in an outdoor parking lot application. The project replaced metal halide (MH) fixtures of nominal 320 watts2 with bi-level LED luminaires from BetaLED equipped with motion sensors. Quantitative light and electrical power measurements were taken to compare base case MH performance with that of the LED replacement luminaires. Economic performance of the LED luminaires as compared to MH was also estimated and qualitative satisfaction with the LEDs was gauged with a customer survey.

The facility selected for this demonstration is a Raley’s Supermarket parking lot containing 16 polemounted 320-watt MH dropped-lens ‘cobrahead’-style luminaires. The demonstration area is approximately one-half of the parking lot. Within the parking aisles are four poles, each with two Type V distribution fixtures. The easternmost poles in the demonstration area each included one flood light directed east toward the store front, in addition to the twin-mount Type V luminaires3. The area east of these poles was not included in the illuminance performance evaluation, due to influence by the flood lights.

Read the full report:   https://www1.eere.energy.gov/buildings/publications/pdfs/ssl/gateway_raleys.pdf

This is a case study for Cedar Rapids Hy-Vee store (4035 Mount Vernon Road Southeast, Cedar Rapids, Iowa) parking lot lighting and Health Foods area retrofit demonstration project. Sponsored by Alliant Energy, the parking lot underwent a lighting retrofit from the existing 1000 watt Metal Halide (MH) lighting to 309 watt Light-Emitting Diode (LED) lighting technology in October 2010. Also upgraded was the Health Foods area supplemental shelf lighting from the PAR38 90 watt halogen light bulb to the 16 watt PAR38 LED light bulb. The comparison of design and actual light levels, power consumption, and energy savings are made in this report. Discussions on “before” and “after” values and comparisons to lighting guidelines from IESNA, ASHRAE and Hy-Vee internal requirements are presented.

The key conclusion of this study is that LED lighting can provide up to 69% energy savings when compared to metal halide lighting while maintaining similar average light levels when used for exterior parking lot lighting. The LED lighting also has the benefit of distributing a more uniform light in the parking lot, making it a good choice when security is a concern or high priority. When the LED lights serve as interior display lights, they highlight certain areas well because of their directional property. Proper design of the heights, locations and orientations of LED display/track lights is essential to take advantage of this directional property. The greatest benefit LED lighting provides to retail stores is the longer lamp life compared to halogen lamps which leads to lower maintenance and replacement costs. With the trend of lowering cost and higher efficiency, LED is an excellent lighting source for various exterior and interior applications.

Read the full report:   http://www.leepcampaign.org/uploads/7/4/8/7/7487823/hy-vee-report-20110107.pdf

Brighter dairy cases, greater comfort for customers, lower electricity usage, better store lighting and reduced maintenance needs are the many benefits resulting from three projects recently completed by the Carnival Foods store in Lancaster, Ohio with the help of AEP Ohio’s business incentives for energy efficiency.

Read the full report:   https://aepohio.com/global/utilities/lib/docs/save/business/programs/SuccessStories/CarnivalFoods.pdf

Whole Foods Market is working with the National Renewable Energy Laboratory (NREL) on a retrofit and a new construction CBP project. This case study is a snapshot of the progress to date of the Whole Foods Market CBP new construction project in Raleigh, North Carolina. It describes the successes and challenges of working collaboratively and using strategies and technologies that meet Whole Foods Market’s business criteria to dramatically reduce energy consumption. The new Raleigh store is currently under construction, and is expected to be completed in the spring of 2011.

This case study demonstrates the value of the project to Whole Foods Market, the degree to which the involvement of members of NREL’s Commercial Buildings Research Group helped stretch the team’s thinking about how to reduce energy consumption, and the lessons learned that are useful to the broader food sales industry. These lessons will be shared among members of the Commercial Building Energy Alliances (DOE 2010a) as well as with other interested commercial building professionals.

Read the full report here.