CalGreen July 2012 Non-Residential: 5.106.8 Light pollution reduction

5.106.8 Light pollution reduction.

IESNA TM‐15‐11 2011, TABLE 5.106.8 for allowable BUG ratings

CALGreen Section: 5.106.8 Light pollution reduction. Outdoor lighting systems shall be designed and installed to comply with the following:

 

1. The minimum requirements in the California Energy Code for Lighting Zones 1-4 as defined in Chapter 10 of the California Administrative Code; and

2. Backlight, Uplight and Glare (BUG) ratings as defined in IESNA TM-15-11; and

3. Allowable BUG ratings not exceeding those shown in Table 5.106.8, or  Comply with a local ordinance lawfully enacted pursuant to Section 101.7, whichever is more stringent.

 

Exceptions:

1.   Luminaries that qualify as exceptions in Section 147 of the California Energy Code

2.   Emergency lighting

 

Note:  See also California Building Code, Chapter 12, Section 1205.6 for college campus lighting requirements for parking facilities and walkways.

 

5.106.8.1 Effective date.  Newly constructed nonresidential projects with outdoor lighting for which an application for a building permit is submitted on or after July 1, 2012 shall comply with this section.

TABLE 5.106.8

[Table not shown for clarity, refer to Code]

Intent:

The intent of this code provision is to ensure that newly constructed projects reduce the amount of light and glare from both interior and exterior light sources leaving the site. This is to minimize light pollution in order to maintain our dark skies.

 

Change for 2012: This section is proposed to be moved from the voluntary Appendix A5 where it was located after modification in a recent emergency rulemaking. Problems with the version published in the 2010 code were identified as potential threats to public safety due to inadequate site illumination. In the intervening months between the emergency rulemaking and the effective date of the 2012 supplement, it should have been tested for utility and ease of compliance and enforcement as a voluntary standard when it becomes mandatory in its new format.

 

 

Existing Law or Regulation:

There are several existing codes that are being referenced in this provision as follows:

1. Lighting power requirements in the California Energy Code, CCR, Title 24, Part 6.

2. Lighting zone characteristics and lighting zones 1-4 as defined in Chapter 10 of the

CaliforniaAdministrative Code, CCR Title 24, Part 1.

3. California Building Code, CCR title 24, Part 2 Section 1205.6 exception regarding campus lighting for parking and walkways.

4. The latest standards of the Illuminating Engineers Society in TM-15-11.

 

 

Compliance Method:

FIRST:

Comply with California Energy Commission regulations in Part 1 and Part 6 cited above. Those standards form a basis upon which to build for the purpose of light pollution reduction in addition to energy efficiency. The provisions in Part 1 provide a weighted approach to the project site location, with a project located in the middle of a big city allowed more light to escape than a project at a rural or urban location. Part 6 addresses power and energy efficiency of outdoor lighting. There are exceptions for certain occupancies for lighting power requirements which would apply to this provision, but voluntary compliance with any or all of the items is encouraged.

 

THEN:

To comply with this provision, either:

1.   Consult and comply with a local dark skies ordinance, if more stringent than these regulations.

2.   Specify exterior lighting fixtures that meet IESNA TM-15-11 regarding backlight, up light and glare. Rating may not exceed those values shown in Table 5.106.8

 

Enforcement:

Plan Intake: The reviewer and/or plan checker should review the construction documents, including exterior light sources, to confirm compliance with Part 1, Part 2 and Part 6; review the electrical plans and specifications for complying building and exterior lighting, including photometric data for perimeter site lighting fixtures; and review specifications for any controls

to be installed on the project.

 

On-Site Enforcement: The inspector should review the permit set of plans to verify that all lighting and power calculations and specified products are installed as specified on the approved plans and specifications.

STATE OFCALIFORNIA– STATE AND CONSUMER SERVICES AGENCY                            GOVERNOR EDMUND G. BROWN JR.

BUILDING STANDARDS COMMISSION

2525 Natomas Park Drive, Suite 130

Sacramento,California95833-2936(916) 263-0916 FAX (916) 263-0959

 

 

 

 

BUILDING STANDARDS BULLETIN 11-02

 

 

DATE:              April 26, 2011

 

TO:                             LOCAL BUILDING OFFICIALS INTERESTED PARTIES

 

SUBJECT:     CHANGES TO THE CALIFORNIA GREEN BUILDING STANDARDS  ODE (CALGreen) REGARDING LIGHT POLLUTION REDUCTION

 

This bulletin is to bring attention to new requirements of the 2010 California Building Standards Code in Title 24, Part 11 of the California Code of Regulations (as also known as CALGreen). Specifically, the new requirement affects Chapter 5 – Nonresidential Mandatory Measures, Division 5.1, Section 5.106.8 Light pollution reduction.

 

The California Building Standards Commission (CBSC) at its April 19, 2011 meeting approved an emergency proposal submitted in response to a public petition regarding concerns over security aspects of the light pollution reduction provisions currently in effect in the 2010

CALGreen code.

 

The repealed language and modified language relocated to Appendix A5 via this emergency adoption, is reprinted herein for your reference. Please note that during the ensuing comment period which this provision is subject to, the language may be further amended.

 

Upon approval of the proposed emergency, the existing provisions in Section 5.106.8 were repealed and new requirements were approved. Proposed changes to the regulations include removal of language that presented public safety concerns and compliance difficulties in favor of referenced national standards.

 

This action corrects and simplifies the light pollution provisions and moves them to the voluntary appendix, with mandatory adoption delayed until July 1, 2012, to allow designers, builders and enforcing agencies time to adjust to the new standards. These emergency modifications were made within CBSC authority, with necessary amendments, and in the interest of public safety.

 

Should you have questions or further clarification is needed concerning this bulletin, please feel  free to contact our technical staff at (916) 263-0916 or through our contact e-mail address cbsc@dgs.ca.gov.

 

 

 

 

 

 

Dave Walls

Executive Director

(REPEAL LANGUAGE)

 

 

SECTION 5.106

SITE DEVELOPMENT

 

5.106.8 Light pollution reduction. Meet lighting power requirements in the California Energy Code, CCR, Title 24, Part 6, and design interior and exterior lighting such that zero direct-beam illumination leaves the building site. Comply with lighting zones 1-4 and lighting zone characteristics as defined in Chapter 10 of the California Administrative Code, CCR, Title 24, Part 1, using the following strategies:

1. Shield all exterior luminaires or provide cutoff luminaires per Section 132 (b) of the California Energy Code.

2. Contain interior lighting within each source.

3. Allow no more than .01 horizontal footcandles to escape 15 feet beyond the site boundary.

4. Automatically control exterior lighting dusk to dawn to turn off or lower light levels during inactive periods.

 

Exceptions:

1.                     CCR, Title 24, Part 2, Chapter 12, Section 1205.6 for campus lighting requirements for parking facilities and walkways

2.    Emergency lighting and lighting required for nighttime security

 

 

(NEW AMENDED LANGUAGE)

 

SECTION A5.106

SITE DEVELOPMENT

 

A5.106.8 Light pollution reduction. Outdoor lighting systems shall be designed and installed to comply with the following:

1.  The minimum requirements in the California Energy Code for Lighting Zones 1-4 as defined in Chapter 10 of the California Administrative Code; and

2.  Backlight, Uplight and Glare (BUG) ratings as defined in IESNA TM-15-07; and

3.  Allowable BUG ratings not exceeding those shown in Table A5.106.8, or

 

Comply with a local ordinance lawfully enacted pursuant to Section 101.7, whichever is more stringent.

 

Exceptions:

1.             Luminaires that qualify as exceptions in the California Energy Code

2.             Emergency lighting

 

Note:  See also California Building Code, Chapter 12, Section 1205.6 for college campus lighting requirements for parking facilities and walkways.

 

TABLE A5.106.8

Maximum Allowable Backlight, Uplight and Glare (BUG) Ratings1

 

Allowable Rating	Lighting Zone 1	Lighting Zone 2	Lighting Zone 3	Lighting Zone 4
Allowed Backlight Rating
Greater than 2 mounting heights from property line	B3	B4	B5	B5
1 – 2 mounting heights from property line and oriented with B towards the property line	B2	B3	B4	B4
0.5 – 1 mounting height from property line and oriented with B towards the property line	B1	B2	B3	B3
Less than 0.5 mounting height from property line adjacent to a street and oriented with B towards the property line2	B0	B1	B2	B3
Less than 0.5 mounting height from property line and oriented with B towards the property line	B0	B0	B1	B2
Allowed Uplight Rating	U0	U1	U2	U3
Allowed Glare Rating2	G1	G2	G3	G4
Allowed Glare Rating, Building Mounted Luminaires3
Greater than 2 mounting heights to any property line	G1	G2	G3	G4
1 – 2 mounting heights to any property line	G0	G1	G1	G2
0.5 – 1 mounting heights to any property line	G0	G0	G1	G1
Less than 0.5 mounting height to any property line	G0	G0	G0	G1

 

1 IESNA Lighting Zones 0 and 5 are not applicable; refer to Lighting Zones as defined in the California Energy Code and Chapter 10 of the California Administrative Code.

2 For purposes of compliance with this section, the property line may be considered to be the centerline of a public roadway or transit line. For properties adjacent to public walkways, bikeways, plazas and parking lots, the property line may be considered to be five feet beyond the site boundary.

3 Building-mounted luminaires that cannot be mounted with their backlight to the property line shall meet the Allowed Glare rating for all luminaires. Light from a building-mounted luminaire shall not exceed the Backlight rating in the direction of the property line.

Addendum A for IESNA TM-15-07: Backlight, Uplight, and Glare (BUG) Ratings

 

The following Backlight, Uplight, and Glare ratings may be used to evaluate luminaire optical performance related to light trespass, sky glow, and high angle brightness control. These ratings are based on a zonal lumen calculations for secondary solid angles defined in TM-15-07. The zonal lumen thresholds listed in the following three tables are based on data from photometric testing procedures approved by the Illuminating Engineering Society for outdoor luminaries (LM-31 or LM-35).

 

 

 

 

Table A-1: Backlight Ratings (maximum zonal lumens)

 

B0     B1     B2     B3     B4     B5     Backlight / Trespass   BH   110   500   1000   2500   5000   >5000   BM   220   1000   2500   5000   8500   >8500   BL   110   500   1000   2500   5000   >5000

Backlight Rating

Secondary Solid Angle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table A-2: Uplight Ratings (maximum zonal lumens)

 

U0     U1     U2     U3     U4     U5     Uplight / Skyglow   UH   0   10   100   500   1000   >1000   UL   0   10   100   500   1000   >1000   FVH   10   75   150   >150       BVH   10   75   150   >150

Uplight Rating

Secondary Solid Angle

 

 

 

 

Table A-3: Glare Ratings (maximum zonal lumens)

 

Glare Rating for

G0     G1     G2     G3     G4     G5   Glare / Offensive Light   FVH   10   250   375   500   750   >750   BVH   10   250   375   500   750   >750   FH   660   1800   5000   7500   12000   >12000   BH   110   500   1000   2500   5000   >5000

Asymmetrical Luminaire Types (Type I, Type II, Type III, Type IV)

 

Secondary Solid Angle

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Glare Rating for

G0     G1     G2     G3     G4     G5   Glare / Offensive Light   FVH   10   250   375   500   750   >750   BVH   10   250   375   500   750   >750   FH   660   1800   5000   7500   12000   >12000   BH   660   1800   5000   7500   12000   >12000

Quadrilateral Symmetrical Luminaire Types (Type V, Type V Square)

 

Secondary Solid Angle

Notes to Tables A-1, A-2, and A-3:

 

(1) Any one rating is determined by the maximum rating obtained for that table. For example, if the BH zone is rated B1, the BM zone is rated B2, and the BL zone is rated B1, then the backlight rating for the luminaire is B2.

 

(2) To determine BUG ratings, the photometric test data must include data in the upper hemisphere unless no light is emitted above 90 degrees vertical (for example, if the luminaire has a flat lens and opaque sides), per the IES Testing Procedures Committee recommendations.

 

(3) It is recommended that the photometric test density include values at least every

2.5 degrees vertically. If a photometric test does not include data points every 2.5 degrees vertically, the BUG ratings shall be determined based on appropriate interpolation.

 

(4) A “quadrilateral symmetric” luminaire shall meet one of the following definitions:

a.  A Type V luminaire is one with a distribution that has circular symmetry, defined by the IESNA as being essentially the same at all lateral angles around the luminaire.

b.  A Type VS luminaire is one where the zonal lumens for each of the eight horizontal octants (0-45, 45-90, 90-135, 135-180, 180-225, 225-270, 270-

315, 315-360) are within ±10 percent of the average zonal lumens of all octants.