Find out how Citi reduced energy consumption and C02 emissions with office lighting.
provides us with more precise zoning so that only occupied areas are lit. The dimming functionality also enables us to adjust lighting levels within the zones to suit the preferences of the people working in those spaces.”
- Les Smith, EMEA Critical Facilities Engineering Manager
Citi cares about the environment. With a goal to increase energy efficiency by 20% by 2015 compared to 2005 figures, some innovative ideas were required.
We stepped up to the task. LED luminaires replaced the existing lights in a test area, before being rolled out across the floors. To facilitate installation, we designed a custom luminaire that would fit into the existing ceiling fixtures, lowering setup costs. The new lighting system improved visual comfort with clean, glare-free illumination, and the dimmable LEDs created many opportunities for saving electricity thanks to their low power consumption.
Further savings were made possible through the LightMaster controls. This system automatically dims the fixtures in relation to natural light entering the building, ensuring that artificial light is never used more than necessary. The LightMaster control system also utilises occupancy control, which means that lights are turned off when rooms are empty, thanks to motion detection sensors. An additional bonus of the new LED lights is the long lifetime of the bulbs, which will significantly reduce maintenance costs.
The combination of LED and smart lighting control systems has delivered energy savings of around 45% compared to the previous lighting installation. Daylight harvesting alone accounted for a 36% energy reduction in the building perimeter.