ASHRAE-90.1-2022- - Page 159
Extracted Content
Table 9.4.2-1 Exterior Lighting Zones
| Lighting Zone | Description |
|---|---|
| 0 | Undeveloped areas within national parks, state parks, forest land, rural areas, and other undeveloped areas as defined by the_authority having jurisdiction_ |
| 1 | Developed areas of national parks, state parks, forest land, and rural areas |
| 2 | Areas predominantly consisting of_residential_ zoning, neighborhood business districts, light industrial with limited nighttime use and_residential_ mixed use areas |
| 3 | All other areas |
| 4 | High-activity commercial districts in major metropolitan areas as designated by the local jurisdiction |
9.4.1.4 Exterior Lighting Control. For each surface or area, all of the lighting control functions indicated in Table 9.4.2-2 shall be implemented. Lighting for exterior applications not exempted in Section 9.1 shall meet the requirements defined here and listed in Table 9.4.2-2:
a. OFF control: There shall be one or more lighting control(s) that turns off all of the lighting in the area or surface. b. Daylight OFF control: Lighting shall automatically turn off when sufficient daylight is available or within
30 minutes of sunrise. c. Scheduled OFF control: Lighting shall be automatically shut off between midnight or business closing,
whichever is later, and 6 a.m. or business opening, whichever comes first, or between times established by the authority having jurisdiction . d. Scheduled light reduction control: Lighting and signage shall be controlled to automatically reduce the
connected lighting power by at least 50% from midnight or within one hour of the end of business operations, whichever is later, until 6 a.m. or the beginning of business operations, whichever is earlier. e. Occupancy-sensing light reduction control: Lighting shall be controlled to automatically reduce the con nected lighting power by a minimum of 50% when no activity has been detected in the area illuminated by the controlled luminaires for a time of no longer than 15 minutes. No more than 1500 W of lighting power shall be controlled together.
All time switches shall be capable of retaining programming and the time setting during loss of power for a period of at least ten hours .
9.4.2 Exterior Lighting Power. The total exterior lighting power allowance for all exterior applications is the sum of the base site allowance plus the individual allowances for areas that are designed to be illuminated and are permitted in Table 9.4.2-2 for the applicable lighting zone in Table 9.4.2-1. The installed exte- rior lighting power identified in accordance with Section 9.1.3 shall not exceed the exterior lighting power allowance developed in accordance with this section. Trade-offs are allowed only among exterior lighting applications listed in the Table 9.4.2-2 “Tradable Surfaces” section. The lighting zone for exterior applications is determined from Table 9.4.2-1 unless otherwise specified by the local jurisdiction.
9.4.3 Dwelling Units. Dwelling unit lamps, luminaires, and lighting controls shall be installed to meet the provisions of Sections 9.4.3.1, 9.4.3.2, and 9.4.3.3. No other provisions of Section 9 apply to dwelling units .
9.4.3.1 Lamp and Luminaire Efficacy. At least 75% of the permanently installed luminaires shall use lamps with an efficacy of at least 75 lm/W or have a total luminaire efficacy of at least 50 lm/W.
9.4.3.2 Interior Lighting Controls. Fifty percent (50%) of permanently installed interior luminaires shall be controlled with dimmers or shall automatically be shut off within 20 minutes of all occupants leaving a space .
9.4.3.3 Exterior Lighting Controls. Permanently installed exterior luminaires dedicated to a dwelling unit shall be provided with manual controls and be automatically shut off through time of day, available daylight, or when no activity has been detected for 15 minutes.
Exception to 9.4.3.3: Applications with a total rated luminaire wattage of no greater than 8 W.
9.4.4 Horticultural Lighting. Greenhouse horticultural lighting shall follow the requirements of Section 9.4.4.1. Indoor grow horticultural lighting shall follow the requirements of Section 9.4.4.2. 9.4.4.1 Luminaires in greenhouse buildings with at least 40 kW of connected load for horticultural light- ing shall have a photosynthetic photon efficacy ( PPE ) of at least 1.7 µmol/J for integrated, nonserviceable luminaires, or a PPE of at least 1.7 µmol/J for lamps in luminaires with removable or serviceable lamps .
ANSI/ASHRAE/IES Standard 90.1-2022 (I-P) 157