How Off-the-Shelf Technologies Slashed 80% of Lighting Energy Use

09/01/2017 |

The advanced lighting strategies behind staggering savings

BERKELEY LAB living lab

Advanced lighting and automated window shading reduced lighting energy usage by nearly 80% in a recent test on one floor of a New York City high-rise during a recent field test.

A partnership of Lawrence Berkeley National Laboratory and the Building Energy Exchange (BEEx), the test incorporated four sets of technologies across one 40,000-square-foot floor of an office building.

The T5 fluorescent lights on the floor were replaced with dimmable LEDs, which were adjusted throughout the day to reflect changes in daylight levels and space occupancy. Researchers raised and lowered automated shades to bring in outside views, let in daylight or reduce glare.

The space was monitored for a full year before the retrofit to create a baseline for comparison, then for another six months after the retrofit.

The 40-foot-deep perimeter zone saw a 79% reduction in lighting-related energy use, and the associated demand for peak lighting was decreased by 74%. Most of the savings resulted from switching to LED lighting and allowing dimming across the entire floor rather than just next to the windows. The ability to customize zone control at the work-group level with advanced controls also contributed significantly to the savings, with many of the configuration decisions based on the need to maintain both bright interiors and access to the outdoors.

If the entire building received the same retrofit, researchers estimate a total electricity savings of $730,000 per year at an average rate of 20 cents per kWh, resulting in a 3- to 12-year payback depending on installed system costs.

“Using everything we learned on this project, we’ve developed a series of tools that will really help the engaged design professional or building owner make better decisions about lighting system upgrades and avoid the common pitfalls on the road to a high performance office space,” explains Yetsuh Frank, BEEx Managing Director of Strategy and Programs.

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See how professionals like you are taking advantage of the highest performing precision cooling system for their computer rooms and data centers, and why Data Aire is fast-becoming the number one choice for facility managers and building owners looking to decrease their energy consumption. 

Data Aire understands how digital technology and data gravity is rapidly impacting and transforming businesses. That’s why they developed ultra-efficient cooling technology to support the most modern (and not-so-modern) data centers.  Learn how One Wilshire in Los Angeles, one of the most advanced carrier hotels today, is surpassing California's strict energy efficiency requirements with Data Aire’s purpose-built system, which provide full-economization for 260 days – almost 72% of the year. That’s a measurable savings! Furthermore, the projected PUE on an annual basis for a full load is at or below 1.2.


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