An Act to improve outdoor lighting, conserve energy, and increase dark-sky visibility

This bill requires Massachusetts state and municipal agencies to follow new outdoor lighting standards when using public funds for new permanent fixtures. It mandates fully shielded fixtures for most outdoor lighting (like roadways and parking lots), limits color temperature to 3000K or lower, and requires lighting to use only necessary brightness levels to reduce energy waste and light pollution. The regulations must be established by January 2026, with exemptions for temporary uses, safety needs, historic structures, and certain decorative lighting. These rules directly affect towns, cities, and state agencies managing public lighting projects funded by state or municipal budgets.