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Table C405.4.2(2)Interior lighting power allowancesSpace-by-space method.

Table C405.4.2(2)
Interior Lighting Power AllowancesSpace-by-Space Method
Common Space-by-Space Typesa
LPDd (w/ft2)
Atrium - First 40 feet in heighte
0.02 per ft. ht.
Atrium - Above 40 feet in heighte
0.03 + 0.02 per ft. in total height
Audience/seating area - Permanent
 
 
In an auditorium
0.50
 
In a convention center
0.66
 
In a gymnasium
0.34
 
In a motion picture theater
0.91
 
In a penitentiary
0.22
 
In a performing arts theater
1.94
 
In a religious building
1.22
 
In a sports arena
0.34
 
Otherwise
0.34
Banking activity area
0.81
Breakroom (see Lounge/breakroom)
 
Classroom/lecture hall/training room
 
 
In a penitentiary
1.07
 
Otherwise
1.00
Conference/meeting/multipurpose
0.98
Copy/print room
0.58
Corridor
 
 
In a facility for the visually impaired (and not used primarily by the staff)b
0.74
 
In a hospital
0.63
 
In a manufacturing facility
0.33
 
Otherwise
0.53
Courtroom
1.38
Computer room
1.37
Dining area
 
 
In a penitentiary
0.77
 
In a facility for the visually impaired (and not used primarily by the staff)b
1.52
 
In a bar/lounge or leisure dining
0.86
 
In a family dining area
0.71
 
Otherwise
0.52
Electrical/mechanical
0.76
Emergency vehicle garage
0.45
Food preparation
0.79
Guest room
0.38
Laboratory
 
 
In or as a classroom
1.02
 
Otherwise
1.45
Laundry/washing area
0.48
Loading dock, interior
0.38
Lobbyc
 
 
In a facility for the visually impaired (and not used primarily by the staff)b
1.44
 
For an elevator
0.51
 
In a hotel
0.85
 
In a motion picture theater
0.42
 
In a performing arts theater
1.60
 
Otherwise
0.72
Locker room
0.60
Lounge/breakroom
 
 
In a health care facility
0.74
 
Otherwise
0.58
Officef
 
 
Enclosed
0.89
 
Open plan
0.78
Parking area, interior
0.15
Pharmacy area
0.91
Restroom
 
 
In a facility for the visually impaired (and not used primarily by the staff)b
0.97
 
Otherwise
0.78
Sales area
1.27
Seating area, general
0.43
Stairway (see space containing stairway)
 
Stairwell
0.55
Storage room
0.50
Vehicular maintenance
0.54
Workshop
1.27
Building Specific Space-by-Space Typesa
Building Specific Space-by-Space Types
LPDd (w/ft2)
Automotive - (See Vehicular maintenance, above)
 
Convention center - Exhibit space
1.16
Dormitory living quarters
0.30
Facility for the visually impairedb
 
 
In a chapel (and not used primarily by the staff)b
1.77
 
In a recreation room (and not used primarily by the staff)b
1.93
Fire stations - Sleeping quarters
0.18
 
Engine rooms
0.45
Gymnasium/fitness center
 
 
In an exercise area
0.58
 
In a playing area
0.96
Health care facility
 
 
In an exam/treatment room
1.33
 
In an imaging room
1.06
 
In a medical supply room
0.59
 
In a nursery
0.70
 
In a nurse's station
0.57
 
In an operating room
1.51
 
In a patient room
0.50
 
In a physical therapy room
0.73
 
In a recovery room
0.92
Libraryf
 
 
In a reading area
0.74
 
In the stacks
1.37
Manufacturing facility
 
 
In a detailed manufacturing area
1.03
 
In an equipment room
0.59
 
In an extra high bay area
(greater than 50-foot floor-to-ceiling height)
0.84
 
In a high bay area
(25 - 50-foot floor-to-ceiling height)
0.98
 
In a low bay (< 25-foot floor-to-ceiling height)
0.95
Museum
 
 
In a general exhibition area
0.84
 
In a restoration room
0.82
Performing arts theater dressing/fitting room
0.32
Post office - Sorting area
0.75
Religious buildings
 
 
In a fellowship hall
0.51
 
In a worship/pulpit/choir area
1.22
Retail facilities
 
 
In a dressing/fitting room
0.57
 
In a mall concourse
0.88
Sports arena - Playing area
 
 
For a Class 1 facility
2.41
 
For a Class 2 facility
1.54
 
For a Class 3 facility
0.96
 
For a Class 4 facility
0.58
Transportation
 
 
In a baggage/carousel area
0.42
 
In an airport concourse
0.29
 
At a terminal ticket counter
0.64
Warehouse - Storage area
 
 
For medium to bulky palletized items
0.46
 
For smaller, hand-carried items
0.76
For SI: 1 foot = 304.8 mm, 1 watt per square foot = 11 W/m2.
a
In cases where both a common space type and a building area specific space type are listed, the building area specific space type shall apply.
b
A "Facility for the Visually Impaired" is a facility that is licensed or will be licensed by local or state authorities for senior long-term care, adult daycare, senior support or people with special visual needs.
c
For spaces in which lighting is specified to be installed in addition to, and controlled separately from, the general lighting for the purpose of highlighting art or exhibits, provided that the additional lighting power shall not exceed 0.5 W/ft2of such spaces.
d
The watts per square foot may be increased by 2 percent per foot of ceiling height above 20 feet, unless specifically directed otherwise by subsequent footnotes.
e
Footnote d may not be used for these occupancy types.
f
The watts per square foot may be increased by 2 percent per foot of ceiling height above 9 feet. Footnote d may not be used for these occupancy types.
[Statutory Authority: RCW 19.27A.025, 19.27A.160, and 19.27.074. WSR 16-03-072, § 51-11C-405054, filed 1/19/16, effective 7/1/16. Statutory Authority: RCW 19.27A.020, 19.27A.025 and chapters 19.27 and 34.05 RCW. WSR 13-04-056, § 51-11C-405054, filed 2/1/13, effective 7/1/13.]
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