Deliver 53% Savings for
THE PRAIRIE SCHOOL | RACINE, WI
Eliminate high pressure sodium lighting, create more perceived light output
and lower energy demands.
LEDs deliver better uniformity with 53% savings.
in perceived light levels and safety for
pedestrian and vehicular traffic.
“This project is from 2008 and at the
time, we really had to provide energy and
maintenance projections to prove that
LEDs were the right solution. The contrast
between the sodium and LED lights is
striking,” says John Casadonte, Vertical
Marketing Manager for Cree. “Because
LED efficiency continues to advance, if we
did this project again with the latest fixtures, we could deliver an additional 50%
The Prairie School in Racine, WI is a 1965
Frank Lloyd Wright-inspired K- 12 facility
located in a wooded, rural setting. The old
sodium lighting for the parking lots had
a yellow cast that impaired color rendering and caused patchy illumination. At
250W, they consumed 300 system watts
per fixture. In addition to saving energy
and improving light quality, new luminaires
would need to complement the site’s historic design.
Using the existing poles, area fixtures
were upgraded to LED light bars that deliver
NOTE THE DRAMATIC DIFFERENCE in light quality between the new LEDs (left) and the original high pressure sodium fixtures (right).
INFORMATION AND IMAGES COURTESY OF CREE
8,040 average lumens yet consume only
141 system watts each. This provides a savings of 53% or 159 system watts over the
original installation. Taking into account
the 50,000-plus hours of fixture life, the
facility team can look forward to over 16
years of maintenance-free operation.
A 1.01 average mean footcandle level
was achieved with an improved maxi-mum/minimum ratio of 8:1. Even though
footcandle levels are reduced from the
high pressure sodium installation, the new
LED system provides a dramatic increase