Ottawa County and Michigan have no dark-sky preserve law for private lots. Cities and townships set lighting standards. Holland Charter Township requires outdoor light to be fully shielded and confined on-site, with fixture color temperature no more than 3,000 Kelvins.
There is no county or statewide dark-sky mandate; lighting is regulated locally under MCL 125.3201. Holland Charter Township Zoning Ordinance Article 12 requires that outdoor light be fully shielded and confined on-site, with wall-pack and pole-mounted fixtures 'down-lighted' and 100 percent cut off so no light is projected above the horizontal plane. New and replacement fixtures may not exceed 3,000 Kelvins color temperature. Flashing, moving, or intermittent lighting and searchlights are prohibited, though residential holiday lighting is exempt. These full-cutoff and warm-color standards function like dark-sky-friendly rules even without a formal preserve designation.
Non-shielded, up-lit, or over-bright fixtures on regulated sites can be cited as zoning violations; the township may require corrective re-aiming or replacement.
Other ordinances people look up for this city. Green dot = verified primary-source excerpt.
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See how Ottawa County's dark sky rules rules stack up against other locations.
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