“When staff would enter the warehouse from other sections of the
facility, such as the packaging area, the lighting differences were so
extreme that it would take a while for their eyes to adjust,” explains
Mike Holliday, a professional engineer with Monsanto.
The company selected over 245 LED high bay fixtures to retrofit
both production zones. The lamps save over 190 watts per fixture
compared to the previous metal halides and payback is expected
within five years.
The lamps are equipped with occupancy sensors, which detect
movement from 15-20 feet away. Because the high bays have
instant-on capabilities, staff are no longer reluctant to turn off the
lighting like they were with the metal halides because of the slow
startup time, Holliday notes. These features ensure the facility
isn’t illuminated 24 hours a day.
Due to the increased light levels, the safety issues present before
the upgrade have also been eliminated.
“The forklift operators agree it’s a night and day change,” says
Philip Niemerg, an electrical engineer with Monsanto. “Before,
their eyes took much more time to adjust upon entering and exiting the facility. By increasing their visual comfort, the number of
safety hazards have been reduced.”
INFORMATION AND IMAGES COURTESY OF ACUIT Y BRANDS LIGH TING
CONSERVE 1 MILLION KWH
NIAGARA FALLS AIR RESERVE STATION
NIAGARA FALLS, NEW YORK
At the Niagara Falls Air Reserve Station, energy efficiency is considered a mis- sion critical strategy. Working from a 2003 baseline, the military installation was tasked to reduce its energy use by 3% each year under the Energy Independence and Security Act of 2007. One of its latest projects to offset consumption was to install over 2,700 occupancy sensors at the end of 2013.
“We used a combination of wired, in-wall, and wireless ceiling-mounted occupancy
sensors to control over 350,000 square feet, amounting to 1.8 million watts of connected
power,” says Maj. Matt Heinsler, base energy manager.
Occupancy sensors were identified in a recent audit as an opportunity to achieve a
high ROI. Interior lighting had already been switched to T8s and most exterior and high
bay fixtures were slated for LED replacements – lighting controls were the next strategy
that was easily in reach.
“Some of the highest areas of impact have been in restrooms, break rooms, fitness
areas, conference rooms, storage closets, and hallways where lights were previously on
12 to 13 hours a day despite low levels of occupancy,” Heinsler notes.
Wireless sensors also saved on installation costs, providing the ability to expand occupancy controls without additional wiring.
“The bottom line is that occupancy sensors have saved nearly a million k Wh annually, which translates to a cost savings of $84,270,” says Heinsler. “This will pay for
the installation in three to four years, which means that everything we save for the
next seven years can be put to better use. That’s a reinvestment opportunity of over
$75,000 each year.”
Lack of controls meant lighting
was used continuously regardless
of occupancy levels.
Adding motion sensors ensures
lights automatically turn off when
the space is empty, saving over
$84,000 a year.
IMAGES COURTESY OF LU TRON, INFORMATION COURTESY
OF MAT T HEINSLER