During the summer of 2014, we replaced the florescent fixtures throughout our office to new LED lamps. We received approximately $1,700 from Ameren toward this project and reduced our lighting load by 75%.
We started with (120) 2' x 2' fixtures. The fixtures are a mixture of T-12 and T-8 bulbs. During the upgrade, we reduced the number of fixtures by 12 due to areas being over lit, and dimmed the remaining fixtures to about 50% load to provide the appropriate lighting levels for each zone. Our outdoor 400w flood lights were also replaced with 130w LED fixtures.
Using LEDs has not only improved the light level, but there is now less heat load on our HVAC systems.
Our lobby area is a two-story high bay that requires a lift for bulb replacement. The new LEDs should last for 15 to 20 years, which will save us many man hours of bulb and ballast replacements.
When you add our lighting control system and the solar panels to our building, we have come a long way in making our building very energy efficient and a true example of a green building!