Dark Sky Rules: Kailua vs Waipahu
How do dark sky rules rules compare between Kailua, HI and Waipahu, HI?
Waipahu has fewer restrictions than Kailua.
Kailua, HI
Honolulu County
Commercial, industrial, and outdoor-recreation lighting in Kailua must use full cut-off shielded fixtures to protect night skies and adjacent residential areas, consistent with state night sky policy.
View full Kailua rules →Waipahu, HI
Honolulu County
Waipahu commercial, industrial, and recreational development must use full cut-off shielded fixtures under ROH 21-4.100, protecting dense plantation-era residential blocks from light spill.
View full Waipahu rules →Key Facts Comparison
| Fact | Kailua | Waipahu |
|---|---|---|
| - | - | |
| Code section | - | ROH 21-4.100 |
| Fixture type | - | Full cut-off shielded |
| Applies to | - | Commercial/industrial |
| State companion | - | HRS 201-8.5 |
| Rooftop rule | - | Shield beyond rooftop |
Highlighted rows indicate differences between cities.
Kailua FAQ
Does this apply to my home security light?
Residential single-family fixtures are not the main focus, but trespass onto neighbors can still be actionable under nuisance rules.
Is rooftop restaurant lighting covered?
Yes. Non-enclosed rooftop spaces must be shielded to prevent light from escaping beyond the rooftop.
Waipahu FAQ
Does the rule cover shopping centers on Farrington Highway?
Yes. Commercial sites along Farrington Highway must install full cut-off shielded fixtures to eliminate light spill onto adjacent residential Waipahu blocks.
What is a full cut-off fixture?
A fixture designed so no light is emitted above horizontal, directing all output downward. This is the standard required by ROH 21-4.100.
Are Waipahu sports field lights regulated?
Yes. Outdoor recreational lighting is covered by LUO 21-4.100 and must use shielded fixtures that eliminate illumination onto neighboring residential properties.
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