The DarkSky Approved program provides objective, third-party certification for lighting products, lighting designs, and installed lighting projects that minimize glare, reduce light trespass, and reduce light pollution. To be certified, they must:

• Restrict the amount of upward-directed light
• Avoid glare
• Avoid over-lighting
• Utilize dimming and other appropriate lighting controls
• Minimize short-wavelength (blue) light in the nighttime environment