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Measure: Upgrade to high efficiency lighting

Building Size: 5,000 gsf
Climate Zone: Hot - Humid

Measure: Upgrade to high efficiency lighting

Building Size: 5,000 gsf
Climate Zone: Hot - Humid
Upgrade to high efficiency lighting
Measure Simple Payback (years) Approximate Capital Cost ($) Annual Energy Savings (kBtu/sf) Annual Energy Savings (kBtu/yr) Annual Cost Savings ($/sf) Annual Cost Savings ($/yr)
Upgrade to high efficiency lighting 1-3 $25,000 --- --- --- ---

Description:

Lighting is often an area targeted for improvement in existing office buildings. Lighting upgrades can come in many forms, including light-emitting diodes (LEDs), high-efficiency fluorescents, or downsizing from T-12 fluorescent bulbs to T-8 or T-5 bulbs. Lighting accounts for 30-40% of commercial building energy consumption, and these technologies can reduce lighting energy usage from 35% (T-8 high efficiency fluorescent) to 75% (LED).

Special Considerations

  • When replacing fluorescent tubes with higher-efficiency, longer-life LEDs, consider replacing the entire fixture to avoid incompatibilities between the bulb and the ballast which could degrade performance, shorten bulb life, or create a safety hazard.  Alternatively, use an LED tube with an integrated driver.
  • Consider bundling this upgrade with occupancy and/or daylight sensors for additional savings.

Estimates for this measure come from the Department of Energy’s Energy Efficiency in Separate Tenant Spaces Feasibility Study.