LOW ENERGY LIGHTING
DIMMING AND LAYOUT OPTIONS TO REDUCE LIGHTING ENERGY COSTS

   
  DIMMING OPTIONS

  Occupancy Detection

People are frequently away from their desk. Time out of the office is estimated at about 35% of core hours. Unoccupied lit offices waste energy… and create an energy savings opportunity. Agili-T luminaires with built-in iGEN motion sensors typically deliver 30% savings in lighting energy consumption, which is consistent with industry estimates. A 2001 study found that occupancy-based energy savings in a private office range from 28% to 38%, depending on sensor time delay (1).

Agili-T Coplanar Solo with MultiSense IR/DH built-in motion/daylight all-in-one sensor
Motion Sensor 90°
Daylight Sensor 70°

Daylight Harvesting

This strategy involves dimming luminaires automatically in response to available daylight in order to maintain constant light levels. In addition to delivering energy savings, the increased fenestration brings significant psychological benefits to workers. According to the Lighting Controls Association (2), continuous-dimming daylighting systems, such as those combining Agili-T luminaires and iGEN solutions, provide substantial savings in lighting energy consumption that typically range from 30% to 40% when a building’s architecture properly integrates daylight as a primary light source, depending on building location, orientation and other factors. Recent figures released by the EPA (3) show daylighting can generate up to 80% savings in lighting energy consumption.

1 Demand Reduction and Energy Savings Using Occupancy Sensors study, 2001 – National Electrical Manufacturers Association (NEMA).
2 “Why Do Daylight Harvesting Projects Succeed or Fail?”, 2006 – Lighting Controls Association.
3 Heschong Mahone Group Study, 2006 – U.S. Environmental Protection Agency WebCast.

Wireless Infrared
Remote Control		 Pop-up Dimming Controls

Personal Control

Studies show that, when given the option, people overwhelmingly select light levels that represent lighting power densities below recommended levels. Not only can they meet their individual preferences, but their “personal control” over lighting can result in lower energy bills. Agili-T/iGEN lighting solutions can include desktop dimming and remote control dimming to create additional lighting-related energy cost savings.


LIGHTING LAYOUT OPTIONS

Wide Luminaire Spacing

Most Agili-T luminaires supply extra-wide indirect light distribution, meaning fewer luminaires are required in a given space. This, together with high luminaire efficiency (up to 92%), contributes to lowering a building’s lighting power density.

“One luminaire per person” Strategy

These configurations typically use one Agili-T dual-optic luminaire per workstation. The uplight portion, controllable via iGEN network lighting, provides uniform brightness on walls and ceilings. The downlight portion, dimmable via desktop controls, provides direct lighting for tasks. The direct optic can also be controlled by a motion sensor and/or daylight sensor, in order to optimize energy cost savings.

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