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Lights vs. Power Installation

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The table below can be used as a guide to installed light power in some common types of buildings and rooms.

Typical Lights Power Installation
Type of Building/RoomLight Power
(watts/Sq.Ft.)
Apartments 1.0 - 4.0
Banks 2.0 - 5.0
Bars 1.5 - 2.0
Cafeterias 1.5 - 2.5
Churches 1.0 - 3.0
Clubhouses 1.5 - 2.0
Cocktail Lounges 1.5 - 2.0
Computer Rooms 1.5 - 5.0
Court Houses 2.0 - 5.0
Dental Centers 1.5 - 2.5
Department Stores 1.0 - 3.0
Dining Halls 1.5 - 2.5
Drug Store 1.0 - 3.0
Fire Stations 2.0 - 3.0
Hospitals, General Areas 1.5 - 2.5
Hotels Public Spaces 1.5 - 3.0
Kindergarten 1.0 - 3.0
Kitchens 1.5 - 3.0
Jail 1.0 - 2.5
Libraries 1.0 - 3.0
Luncheonettes 1.5 - 2.5
Lunch Rooms 1.5 - 2.5
Malls 1.0 - 3.0
Medical Centers 1.5 - 2.5
Motels Public Areas 1.5 - 3.0
Motels Guest Rooms 1.0 - 3.0
Municipal Buildings 2.0 - 5.0
Museums 1.0 - 3.0
Nightclubs 1.5 - 2.0
Nursing Home Patient Rooms 2.0 - 3.0
Police Stations 2.0 - 3.0
Post Offices 2.0 - 3.0
Precision Manufacturing 2.0 - 3.0
Residential 1.0 - 4.0
Retail Stores 2.0 - 6.0
Restaurants 1.5 - 3.0
School Classrooms 2.0 - 6.0
Shops 1.0 - 3.0
Supermarkets 1.0 - 3.0
Taverns 1.5 - 2.0
Town Halls 2.0 - 5.0
  • 1 ft2 = 0.0929 m2 = 144 in2 = 0,1111 yd2
  • 1 watts/ft2 = 10.8 watts/m2
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