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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 rate 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 or program 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 |
Compact fluorescent, nonintegral ballast |
3.5 mg mercury |
12,000 rated hours |
Compact fluorescent, integral ballast |
3.5 mg mercury, ENERGY STAR qualified |
Bare bulb - 10,000 rated 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 |
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Cost estimates for this credit
On each BD+C v4 credit, LEEDuser offers the wisdom of a team of architects, engineers, cost estimators, and LEED experts with hundreds of LEED projects between then. They analyzed the sustainable design strategies associated with each LEED credit, but also to assign actual costs to those strategies.
Our tab contains overall cost guidance, notes on what “soft costs” to expect, and a strategy-by-strategy breakdown of what to consider and what it might cost, in percentage premiums, actual costs, or both.
This information is also available in a full PDF download in The Cost of LEED v4 report.
Learn more about The Cost of LEED v4 »Frequently asked questions
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© Copyright U.S. Green Building Council, Inc. All rights reserved.
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 rate 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 or program 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 |
Compact fluorescent, nonintegral ballast |
3.5 mg mercury |
12,000 rated hours |
Compact fluorescent, integral ballast |
3.5 mg mercury, ENERGY STAR qualified |
Bare bulb - 10,000 rated 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 LED lamps qualify automatically for this credit, regardless of rated lifetime?The answer to this question is available to LEEDuser premium members. Start a free trial » (If you're already a premium member, log in here.) |
