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LEED v4.1
Healthcare
Materials and Resources
PBT Source Reduction - Mercury

LEED CREDIT

Healthcare-v4.1 MRc5: PBT source reduction - mercury 1 point

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To reduce the release of persistent, bioaccumulative, and toxic (PBTs) chemicals associated with the life cycle of building materials.

Requirements

Specify and install fluorescent lamps with both low mercury content (MR Prerequisite PBT Source Reduction—Mercury) and long lamp life, as listed in Table 1.

Table 1. Criteria for rated life of low-mercury lamps

Lamp Maximum content Lamp life (hrs)
T-8 fluorescent, eight-foot 10 mg mercury Standard output - 24,000 rated hours on instant start
ballasts (3-hour starts)
High output – 18,000 rated hours on instant start ballasts
or program start ballasts (3-hour starts)
T-8 fluorescent, four-foot 3.5 mg mercury Both standard and high output - 30,000 rated hours on
instant start ballasts, or 36,000 rated hours on program
start ballasts (3 hour starts)
T-8 fluorescent, two-foot and three-foot 3.5 mg mercury 24,000 rated hours on instant start ballasts or program
start ballasts (3-hour starts)
T-8 fluorescent, U-bent 6 mg mercury 18,000 rated hours on instant start ballasts, or 24,000
rated hours on program start ballasts (3-hour starts)
T-5 fluorescent, linear 2.5 mg mercury Both standard and high-output - 25,000 rated hours on
program start ballasts
T-5 fluorescent, circular 9 mg mercury Both standard and high-output – 25,000 rated hours on
program start ballasts
Compact fluorescent, nonintegral ballast 3.5 mg mercury 12,000 rated hours
Compact florescent, integral ballast, bare bulb 3.5 mg mercury, ENERGY STAR qualified Bare bulb - 10,000 rated hours
Covered models such as globes, reflectors, A-19s – 8,000
hours
High-pressure sodium, up to 400 watts 10 mg mercury Use noncycling type or replace with LED lamps or induction
lamps
High-pressure sodium, above 400 watts 32 mg mercury Use noncycling type or replace with LED lamps or induction
lamps

Do not specify or install circular fluorescent lamps or probe start metal halide lamps.

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USGBC logo

© Copyright U.S. Green Building Council, Inc. All rights reserved.

Intent

To reduce the release of persistent, bioaccumulative, and toxic (PBTs) chemicals associated with the life cycle of building materials.

Requirements

Specify and install fluorescent lamps with both low mercury content (MR Prerequisite PBT Source Reduction—Mercury) and long lamp life, as listed in Table 1.

Table 1. Criteria for rated life of low-mercury lamps

Lamp Maximum content Lamp life (hrs)
T-8 fluorescent, eight-foot 10 mg mercury Standard output - 24,000 rated hours on instant start
ballasts (3-hour starts)
High output – 18,000 rated hours on instant start ballasts
or program start ballasts (3-hour starts)
T-8 fluorescent, four-foot 3.5 mg mercury Both standard and high output - 30,000 rated hours on
instant start ballasts, or 36,000 rated hours on program
start ballasts (3 hour starts)
T-8 fluorescent, two-foot and three-foot 3.5 mg mercury 24,000 rated hours on instant start ballasts or program
start ballasts (3-hour starts)
T-8 fluorescent, U-bent 6 mg mercury 18,000 rated hours on instant start ballasts, or 24,000
rated hours on program start ballasts (3-hour starts)
T-5 fluorescent, linear 2.5 mg mercury Both standard and high-output - 25,000 rated hours on
program start ballasts
T-5 fluorescent, circular 9 mg mercury Both standard and high-output – 25,000 rated hours on
program start ballasts
Compact fluorescent, nonintegral ballast 3.5 mg mercury 12,000 rated hours
Compact florescent, integral ballast, bare bulb 3.5 mg mercury, ENERGY STAR qualified Bare bulb - 10,000 rated hours
Covered models such as globes, reflectors, A-19s – 8,000
hours
High-pressure sodium, up to 400 watts 10 mg mercury Use noncycling type or replace with LED lamps or induction
lamps
High-pressure sodium, above 400 watts 32 mg mercury Use noncycling type or replace with LED lamps or induction
lamps

Do not specify or install circular fluorescent lamps or probe start metal halide lamps.

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