This bill creates new requirements for state outdoor roadway and parking lot lighting. When roadway lights are being replaced or planned for new installation, alternatives must be considered, including: reflectors, roadway markers, lines, warnings and other signage, or other passive means. When new lighting fixtures are installed, they must be fully shielded to prevent light from shining upward and reducing visibility of the night sky. The law will not apply if: federal law pre-empts; lighting is in use by emergency or repair personnel, at airports, special events, or for historic illumination; urban areas with nighttime pedestrian traffic; prisons and jails; or when other compelling safety interests may occur. See here for full text and history.