The International Dark-Sky Association was formed in 1988 “to be effective in stopping the adverse environmental impact on dark skies by building awareness of the problem of light pollution and of the solutions, and to educate everyone about the value and effectiveness of quality nighttime lighting.” 

IDA's Model Lighting Ordinance (MLO) was developed to address the need for a strong, consistent model for outdoor lighting regulation in the U.S.  “It aims to address light pollution harms such as glare, light trespass, human health and environmental impacts, and energy waste, by regulating the amount of light that can be used, when it can be used, and what types of fixtures should be used to light outdoor areas.”