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PDFWAC 51-11C-405054

Table C405.4.2(2)—Interior lighting power allowances—Space-by-space method.

Table C405.4.2(2)

Interior Lighting Power Allowances—Space-by-Space Method

Common Space-by-Space Typesa		LPD (w/ft2)
Atrium - Less than 20 feet in height		0.39
Atrium - 20 to 40 feet in height		0.48
Atrium - Above 40 feet in height		0.60
Audience/seating area - Permanenti
	In an auditorium	0.61
	In a gymnasium	0.23
	In a motion picture theater	0.27
	In a penitentiary	0.67
	In a performing arts theater	1.16
	In a religious building	0.72
	In a sports arena	0.33
	Otherwise	0.23
Banking activity areai		0.61
Breakroom (see lounge/breakroom)
Classroom/lecture hall/training room
	In a penitentiary	0.89
	Otherwiseh	0.71
Computer room, data center		0.94
Conference/meeting/multipurpose		0.97
Confinement cell		0.70
Copy/print room		0.31
Corridor
	In a facility for the visually impaired (and not used primarily by the staff)b	0.71
	In a hospital	0.71
	In a manufacturing facility	0.41
	Otherwisec,i	0.41
Courtroomc		1.20
Dining area
	In a penitentiary	0.42
	In a facility for the visually impaired (and not used primarily by the staff)b	1.27
	In a bar/lounge or leisure diningi	0.86
	In cafeteria or fast food dining	0.40
	In a family dining areai	0.60
	Otherwise	0.43
Electrical/mechanical		0.43
Emergency vehicle garage		0.52
Food preparation		1.09
Guest rooma,b		0.41
Laboratory
	In or as a classroom	1.11
	Otherwise	1.33
Laundry/washing area		0.53
Loading dock, interior		0.88
Lobbyc
	In a facility for the visually impaired (and not used primarily by the staff)b	1.69
	For an elevator	0.65
	In a hotel	0.51
	In a motion picture theater	0.23
	In a performing arts theater	1.25
	Otherwise	0.84
Locker room		0.52
Lounge/breakroomi
	In a health care facilityc,i	0.42
	Otherwisei	0.59
Office
	Enclosed ≤ 250	0.74
	Enclosed ˃ 250	0.66
	Open plan	0.61
Parking area, interior		0.15
Pharmacy area		1.66
Restroom
	In a facility for the visually impaired (and not used primarily by the staff)b	1.26
	Otherwisei	0.63
Sales area		1.05
Seating area, general		0.23
Stairway (see space containing stairway)
Stairwellc,i		0.49
Storage room
	< 50 ft2	0.51
	50-100 ft2	0.38
	All other storage	0.38
Vehicular maintenance		0.60
Workshop		1.26

Building Specific Space-by-Space Typesa		LPD (w/ft2)
Automotive (see vehicular maintenance)
Convention center - Exhibit spacei		0.61
Dormitory living quartersa,b		0.50
Facility for the visually impairedb
	In a chapel (and not used primarily by the staff)b	0.70
	In a recreation room (and not used primarily by the staff)b	1.77
Fire stations
	Sleeping quarters	0.23
Gymnasium/fitness center
	In an exercise area	0.90
	In a playing area	0.85
Health care facilityc,i
	In an exam/treatment room	1.40
	In an imaging room	0.94
	In a medical supply room	0.62
	In a nursery	0.92
	In a nurse's station	1.17
	In an operating room	2.26
	In a patient room	0.68
	In a physical therapy room	0.91
	In a recovery room	1.25
Library
	In a reading areai	0.96
	In the stacks	1.10
Manufacturing facility
	In a detailed manufacturing area	0.80
	In an equipment room	0.76
	In an extra high bay area (greater than 50-foot floor-to-ceiling height)	1.42
	In a high bay area (25 - 50-foot floor-to-ceiling height)	1.24
	In a low bay (< 25-foot floor-to-ceiling height)	0.86
Museum
	In a general exhibition areai	0.31
	In a restoration room	1.10
Performing arts theater dressing/fitting room		0.41
Post office - Sorting area		0.76
Religious buildings
	In a fellowship halli	0.54
	In a worship/pulpit/choir areai	0.85
Retail facilities
	In a dressing/fitting room	0.51
	In a mall concourse	0.82
Sports arena - Playing area
	For a Class 1 facilityd	2.94
	For a Class 2 facilitye	2.01
	For a Class 3 facilityf	1.30
	For a Class 4 facilityg	0.86
Transportation
	In a baggage/carousel area	0.39
	In an airport concourse	0.25
	At a terminal ticket counteri	0.51
Warehouse - Storage area
	For medium to bulky palletized items	0.33
	For smaller, hand-carried items	0.69

For SI: 1 foot = 304.8 mm, 1 watt per square foot = 10.76 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	Additional lighting power allowance of 0.2 watts per square foot for the purpose of highlighting art or exhibits. This additional power shall be permitted only where the specified lighting is installed in addition to and controlled separately from general lighting in accordance with Section C405.2.6. This additional power shall be used only for the specified luminaires and shall not be used for any other purpose and it shall not be added to any other space or the interior power allowance.
d	Class I facilities consist of professional facilities; and semiprofessional, collegiate or club facilities with seating for 5,000 or more spectators.
e	Class II facilities consist of collegiate and semiprofessional facilities with seating for fewer than 5,000 spectators; club facilities with seating between 2,000 and 5,000 spectators; and amateur league and high school facilities with seating for more than 2,000 spectators.
f	Class III facilities consist of club, amateur league and high school facilities with seating for 2,000 or fewer spectators.
g	Class IV facilities consist of elementary school and recreational facilities; and amateur league and high school facilities without provisions for spectators.
h	For classrooms, additional lighting power allowance of 4.50 W/lineal foot of white or chalk boards for directional lighting dedicated to white or chalk boards.
i	Additional lighting power allowance of 0.15 W/ft2 for ornamental lighting. Qualifying ornamental lighting includes luminaires that are specifically used in a decorative manner. This additional power shall be permitted only where the specified lighting is installed in addition to and controlled separately from display or general lighting in accordance with Section C405.2.6. This additional power shall be used only for the specified luminaires and it shall not be added to any other space or the interior power allowance.
j	Where a space is designated as unfinished, neither the area nor the lighting power in the space shall be calculated as part of the LPA.

[Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapters 19.27A and 19.27 RCW. WSR 22-14-091, 23-12-101, and 23-20-021, § 51-11C-405054, filed 7/1/22, 6/7/23, and 9/25/23, effective 3/15/24. Statutory Authority: RCW 19.27A.025, 19.27A.045 and chapter 19.27 RCW. WSR 20-21-080, § 51-11C-405054, filed 10/19/20, effective 2/1/21. Statutory Authority: RCW 19.27A.020, 19.27A.025, 19.27A.160 and chapter 19.27 RCW. WSR 19-24-040, § 51-11C-405054, filed 11/26/19, effective 7/1/20. 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.]