Do The Light Levels Satisfy IESHA Guidelines?

    The Illuminating Engineering Society of North America (IESNA) sets minimum light level requirements for spaces and tasks. The new energy efficient lighting system must meet these mimimum IES light levels recommendations.

    Building Area Type Lighting Power Density (Watts / Square Foot) Floating Scale
    −25% −40%
    Automotive Facility 1.5 1.13 0.90
    Convention Center 1.4 1.05 0.84
    Court House 1.4 1.05 0.84
    Dining: Bar Lounge/Leisure 1.5 1.13 0.90
    Dining: Cafeteria/Fast Food 1.8 1.35 1.08
    Dining: Family 1.9 1.43 1.14
    Dormitory 1.5 1.13 0.90
    Exercise Center 1.4 1.05 0.84
    Gymnasium 1.7 1.28 1.02
    Hospital/Health Care 1.6 1.20 0.96
    Hotel 1.7 1.28 1.02
    Library 1.5 1.13 0.90
    Manufacturing Facility 2.2 1.65 1.32
    Motel 2.0 1.50 1.20
    Motion Picture Theater 1.6 1.20 0.96
    Multi-Family 1.0 0.75 0.60
    Museum 1.6 1.20 0.96
    Office 1.3 0.97 0.78
    Parking Garage 0.3 0.23 0.18
    Penitentiary 1.2 0.90 0.72
    Performing Arts Theater 1.5 1.13 0.90
    Police/Fire Station 1.3 0.98 0.78
    Post Office 1.6 1.20 0.96
    Religious Building 2.2 1.65 1.32
    Retail 1.9 1.43 1.14
    School/University 1.5 1.13 0.90
    Sports Arena 1.5 1.13 0.90
    Town Hall 1.4 1.05 0.84
    Transportation 1.2 0.90 0.72
    Warehouse 1.2 Must be Reduced by 50% (0.6)
    Workshop 1.7 1.28 1.02