2 rules for unincorporated Hawaii County, Hawaii.
Verified from official government sources
Hawai'i County has a real dark-sky ordinance (HCC Chapter 14) protecting the Mauna Kea observatories. It requires shielded outdoor fixtures, restricts lamp types, and mandates that low-pressure sodium be the only source for Class II outdoor lighting island-wide.
Hawai'i County's dark-sky ordinance (HCC Ch. 14) controls light trespass by requiring outdoor fixtures to be shielded and, for many lights, turned off from 11:00 p.m. to sunrise. Fully shielded, downward-directed lighting is the standard to keep glare off neighbors and the night sky.
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