Here are the detailed criteria for luminaires to be certified to the DarkSky Approved Luminaires program v3.0: DarkSky Residential Luminaire criteria A. Output: Luminaire total light output shall not exceed 1,000 lumens. B. Uplight: No more than 50 lumens are allowed between 90 and 180 degrees above nadir (i.e., LCS zones UL and UH combined). [...]