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Learn & Plan Topics

  • Indoor Environmental Quality (IEQ)

    Indoor Environmental Quality (IEQ) is most simply described as the conditions inside the building. It includes air quality, but also access to da...

  • Energy & Atmosphere

    Buildings and facilities rely on the operation of mechanical systems and electrical systems to maintain a high level of indoor environmental qual...

  • Sustainable Sites

    Choosing a building's site and managing that site during construction are important to ensure a project’s sustainability. Environmentally r...

Lighting Power Density (LPD)

Lighting Power Density (LPD) is the electrical load of lighting per area lit, measured in watts per square foot. 


Many spaces are overlit (i.e., LPD too high), leading to wasted energy and potential occupant discomfort. Getting LDP right is therefore critical to resolving multiple lighting challenges. Learn more through GSA's Saving Energy through Lighting and Daylighting Strategies resource. 

Whole Building Systems

Materials

  • LED

    Light Emitting Diode (LED) lights have become the most energy efficient and most lifecycle cost effective lighting option on the market today. The c...
  • Automatic Low-Power State

    The first, and in some cases most effective, control method is a built-in, automatic low-power state functionality such as standby or sleep. Some ma...
  • Direct Down Lighting

    Direct down lighting with 2-by-4 or 2-by-2 fluorescent fixtures are common in office buildings and are usually recessed into a dropped ceiling. The...
  • Task Lighting

    Task lights are designed to provide the occupant control of the light levels in their workspace. They illuminate specific work areas and allow fo...