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855773667-LEED-v5-O-M-Reference-Guide-Launch-Edition-1 - Page 094

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sweep timers, occupancy sensors, or programmed master lighting control panels. Projects with 24-hour operations are exempt from the interior lighting requirements.

EXTERIOR LIGHTING

Program time of day controls or meet exterior lighting control requirements of ASHRAE Standard 90.1-2019 . [43] It is important to note the following:

  • Turn off all nonessential exterior lights between midnight and 6 a.m. Essential exterior lighting, like pathway lighting or any lighting required for safety, may be on during this time.

  • ASHRAE 90.1-2019, Section 9.4.1.4 requires exterior lighting controls for exterior fixtures. This includes building façade, landscape, exterior signage, and parking lot lights. Controls may include daylight controls, time-of-day operations, and dimming controls

EXEMPTIONS TO UPLIGHT AND EXTERIOR LIGHTING REQUIREMENTS

The following exterior lighting is exempt from the requirements, provided it is controlled separately from the nonexempt lighting:

  • Specialized signal, directional, and marker lighting for transportation

  • Lighting that is used solely for façade and landscape lighting and is automatically turned off from midnight until 6 a.m.

  • Lighting for theatrical purposes for stage, film, and video performances

  • Government-mandated roadway lighting

  • Hospital emergency departments, including associated helipads

  • Lighting for the national flag

  • Internally illuminated signage

Option 2. Bird Collision Reduction

Option 2 promotes the use of bird-friendly glass in building exteriors. The American Bird Conservancy (ABC) has developed a system to evaluate and rate materials based on their potential threat to birds, known as the Material Threat Factor (TF). [44] This system assigns scores to materials, providing a relative measure of how well they deter bird collisions. The scores help architects and designers select bird-friendly materials for buildings.

43 ASHRAE, “Standard 90.1-2022,” n.d., https://www.ashrae.org/technical-resources/bookstore/standard-90-1. 44 ABC Birds, “What is a Material Threat Factor,” n.d., January 23, 2023, https://abcbirds.org/wp-content/uploads/2023/01/What-is- a-Material-Threat-Factor-1_23.pdf.

U.S. Green Building Council LEED v5 Reference Guide for Operations and Maintenance, April 2025 Launch Edition 84

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