How much energy is saved when a building uses lighting controls? The typical answer is the ever-present lighting term, “It depends.” Research, however, is suggestive:
| Space Type | Controls Type | Lighting Energy Savings Demonstrated in Research or Estimated as Potential |
Study Reference |
| Private Office | Occupancy sensor | 38% | An Analysis of the Energy and Cost Savings Potential of Occupancy Sensors for Commercial Lighting Systems, Lighting Research Center/EPA, August 2000. |
| Multilevel switching | 22% | Lighting Controls Effectiveness Assessment, ADM Associates for Heschong Mahone Group, May 2002. | |
| Manual dimming | 6-9% | Occupant Use of Manual Lighting Controls in Private Offices, IESNA Paper #34, Lighting Research Center. | |
| Daylight harvesting (sidelighting) | 50% (manual blinds) to 70% (optimally used manual blinds or automatic shading system) | “Effect of interior design on the daylight availability in open plan offices”, by Reinhart, CF, National Research Council of Canada, Internal Report NRCC-45374, 2002. | |
| Open Office | Occupancy sensors | 35% | National Research Council study on integrated lighting controls in open office, 2007. |
| Multilevel switching | 16% | Lighting Controls Effectiveness Assessment, ADM Associates for Heschong Mahone Group, May 2002. | |
| Daylight harvesting (sidelighting | 40% | “Effect of interior design on the daylight availability in open plan offices”, by Reinhart, CF, National Research Council of Canada, Internal Report NRCC-45374, 2002. | |
| Personal dimming control | 11% | National Research Council study on integrated lighting controls in open office, 2007. | |
| Classroom | Occupancy sensor | 55% | An Analysis of the Energy and Cost Savings Potential of Occupancy Sensors for Commercial Lighting Systems, Lighting Research Center/EPA, August 2000. |
| Multilevel switching | 8% | Lighting Controls Effectiveness Assessment, ADM Associates for Heschong Mahone Group, May 2002. | |
| Daylight harvesting (sidelighting) | 50% | Sidelighting Photocontrols Field Study, Heschong Mahone Group, 2003. |
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