WAC 51-11C-405054

WAC 51-11C-405054. Table C405.4.2(2) — Interior lighting power allowances — Space-by-space method

Last amended: 2024Year: 2026Length: 2,079 wordsOfficial source
Table C405.4.2(2) Interior Lighting Power Allowances — Space-by-Space Method Common Space-by-Space Types a,j LPD (w/ft 2 ) 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 - Permanent i 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 area i 0.61 Breakroom (see lounge/breakroom) Classroom/lecture hall/training room In a penitentiary 0.89 Otherwise h 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 Otherwise c,i 0.41 Courtroom c 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 dining i 0.86 In cafeteria or fast food dining 0.40 In a family dining area i 0.60 Otherwise 0.43 Electrical/mechanical 0.43 Emergency vehicle garage 0.52 Food preparation 1.09 Guest room a,b 0.41 Laboratory In or as a classroom 1.11 Otherwise 1.33 Laundry/washing area 0.53 Loading dock, interior 0.88 Lobby c 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/breakroom i In a health care facility c,i 0.42 Otherwise i 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 Otherwise i 0.63 Sales area 1.05 Seating area, general 0.23 Stairway (see space containing stairway) Stairwell c,i 0.49 Storage room < 50 ft 2 0.51 50-100 ft 2 0.38 All other storage 0.38 Vehicular maintenance 0.60 Workshop 1.26 Common Space-by-Space Types a,j LPD (w/ft 2 ) 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 - Permanent i 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 area i 0.61 Breakroom (see lounge/breakroom) Classroom/lecture hall/training room In a penitentiary 0.89 Otherwise h 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 Otherwise c,i 0.41 Courtroom c 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 dining i 0.86 In cafeteria or fast food dining 0.40 In a family dining area i 0.60 Otherwise 0.43 Electrical/mechanical 0.43 Emergency vehicle garage 0.52 Food preparation 1.09 Guest room a,b 0.41 Laboratory In or as a classroom 1.11 Otherwise 1.33 Laundry/washing area 0.53 Loading dock, interior 0.88 Lobby c 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/breakroom i In a health care facility c,i 0.42 Otherwise i 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 Otherwise i 0.63 Sales area 1.05 Seating area, general 0.23 Stairway (see space containing stairway) Stairwell c,i 0.49 Storage room < 50 ft 2 0.51 50-100 ft 2 0.38 All other storage 0.38 Vehicular maintenance 0.60 Workshop 1.26 Building Specific Space-by-Space Types a LPD (w/ft 2 ) Automotive (see vehicular maintenance) Convention center - Exhibit space i 0.61 Dormitory living quarters a,b 0.50 Facility for the visually impaired b 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 facility c,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 area i 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 area i 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 hall i 0.54 In a worship/pulpit/choir area i 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 facility d 2.94 For a Class 2 facility e 2.01 For a Class 3 facility f 1.30 For a Class 4 facility g 0.86 Transportation In a baggage/carousel area 0.39 In an airport concourse 0.25 At a terminal ticket counter i 0.51 Warehouse - Storage area For medium to bulky palletized items 0.33 For smaller, hand-carried items 0.69 Building Specific Space-by-Space Types a LPD (w/ft 2 ) Automotive (see vehicular maintenance) Convention center - Exhibit space i 0.61 Dormitory living quarters a,b 0.50 Facility for the visually impaired b 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 facility c,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 area i 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 area i 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 hall i 0.54 In a worship/pulpit/choir area i 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 facility d 2.94 For a Class 2 facility e 2.01 For a Class 3 facility f 1.30 For a Class 4 facility g 0.86 Transportation In a baggage/carousel area 0.39 In an airport concourse 0.25 At a terminal ticket counter i 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/m 2 . 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 allowance 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 allowance 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/ft 2 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. For SI: 1 foot = 304.8 mm, 1 watt per square foot =  10.76 W/m 2 . 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 allowance 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 allowance 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/ft 2 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.
WAC 51-11C-405054: WAC 51-11C-405054. Table C405.4.2(2) — Interior lighting power allowances — Space-by-space method | Justis AI