Previously, the warehouse lights stayed on most of the day, even when there wasn’t any activity in the warehouse or freight docks. “We were spending a lot of money on virtually wasted energy for lighting when there wasn’t any activity in the warehouse,” stated Cox. “We really needed a lighting system that was smart enough to know when to come on fully when needed and either dim down or turn off when there wasn’t activity in the warehouse”. To meet this requirement, Glen Raven Logistics chose Cree LED lighting that had embedded “smarts” to know when the lights needed to come on with sensors and when to dim down and shut off after a specified period of time with no activity. The relighting of the warehouse centered on using the Cree intelligent lighting to light the space more efficiently and effectively.
In addition to improving the lighting levels and uniformity, the new lighting reduced the total number of fixtures from 274 to 122, which represents a reduction in the total number of fixtures by 56%. The Cree® CXB Series High Bay fixtures, incorporating zero re-strike time, allow the integrated motion sensors to quickly turn on with any movement in the warehouse and turn off with an adjustable timing sensor that can be adjusted by personal and operational preference. In the Glen Raven facility, the off time is set at four minutes after sensing no motion in the warehouse. This feature is assisting in delivering a large impact on the energy savings.
In the warehouse loading dock area with lower ceilings, not as much light was required as in the high bay areas of the warehouse. Cree CPY250™ canopy lighting, with programmed motion sensors and dimming, provides just the right amount of light. The flat lenses in the CPY250™ fixtures eliminated any problems with glare that had been an issue with the lower areas of the warehouse. The CPY250™ LED fixtures drop to 20% energy while dimmed and turn off totally when no motion is sensed.