SB 281 - This act directs the Missouri Air Conservation Commission to develop guidelines to limit the amount of nighttime light emitted from non-natural sources near certain state parks and historic sites, national wilderness areas, Squaw Creek National Wildlife Refuge, Ozark National Scenic Riverways, and military training areas. The guidelines shall be designed to voluntarily achieve the following standards: by 2025, no such place should have a night sky more than twice its natural brightness, by 2025, 90% of such places should not be more than 30% brighter than their natural brightness, by 2040, 90% of such places should not be more than 20% brighter, and by 2055, 90% of such places should not be more than 10% brighter. The commission must determine each protected area's natural nighttime brightness and must forecast each area's natural brightness for 1 year, 5 years, and 10 years. ERIKA JAQUES