Light Power Room

Reference data and engineering information about light power room for electrical applications.

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Overview

Engineering reference data for Light Power Room in electrical engineering.

Key Formulas

Ohm's Law

$V = IR$

Voltage = Current × Resistance.

Power

$P = VI = I^2R = V^2/R$

Electrical power.

Energy

$E = Pt$

Energy = Power × Time.

Variables

Symbol	Description	Unit
$V$	Voltage	V
$I$	Current	A
$R$	Resistance	Ω
$P$	Power	W

Light Power Reference Data

41 rows

Typical Installed Light Power for Common Building Types and Rooms
Type of Building/Room	Light Power(watts/ft²)
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

Source: engineeringtoolbox.com

Conversion Factors

The following relationships are essential for converting between common area and power density units:

Area Conversions:

$1 \text{ ft}^2 = 0.0929 \text{ m}^2 = 144 \text{ in}^2 = 0.1111 \text{ yd}^2$

Light Power Density Conversions:

$1 \text{ W/ft}^2 = 10.8 \text{ W/m}^2$

References

Original Source

Source: engineeringtoolbox.com