11903.
(a) Section 11902 does not apply in any of the following circumstances:(1) A federal law or regulation that preempts state law.
(2) A local municipal or county ordinance that establishes requirements that more stringently control light trespass or glare or conserve the natural night sky.
(3) The outdoor lighting fixtures are advertisement signs or other fixtures on interstate highways or federal primary highways.
(4) A compelling safety interest or existing legal requirement requires such lighting, including any of the following:
(A) Navigational lighting for aircraft safety.
(B) Outdoor lighting needed for the safe navigation of watercraft, including, but not limited to, lighthouses and outdoor lighting in marinas.
(C) Outdoor lighting fixtures necessary for worker health and safety or public health and safety, pursuant to Title 8 of the California Code of Regulations.
(D) Lighting that is used by law enforcement officers, firefighters, medical personnel, or correctional personnel, including, but not limited to, lighting used at Department of Corrections and Rehabilitation facilities and State Department of State Hospitals facilities.
(E) Lighting intended for tunnels and roadway underpasses.
(F) Outdoor lighting used for programs, projects, or improvements of a state agency relating to construction, reconstruction, improvement, or maintenance of a street, highway, or state building, structure, or facility.
(G) Outdoor lighting on historic sites or structures, to the extent necessary to preserve the historic appearance.
(H) Lighting sources of less than 1,000 lumens, including, but not limited to, seasonal and decorative lighting.
(I) Other circumstances where a significant interest exists to protect safety or state property that cannot be feasibly addressed by another method, including, but not limited to, lighting needed to discourage vandalism of state agency buildings, structures, and facilities.
(b) If an exemption from Section 11902 pursuant to subdivision (a) applies, a state agency shall make reasonable efforts to install fixtures and employ light management practices that conserve energy, minimize light trespass, and preserve the dark sky while still fully meeting the purposes and requirements of the light fixtures.