2 rules for unincorporated Lancaster County, Pennsylvania.
Verified from official government sources
Lancaster County has no dark-sky ordinance. Full-cutoff and shielding requirements are set by your city/borough/township. Example: Lititz Borough requires fixtures for roadways, parking, and walkways to meet IESNA fully-shielded criteria — no light emitted above 90 degrees — with a 1,800-lumen household exemption.
Lancaster County sets no light-trespass rule. Whether a floodlight spilling onto a neighbor's property is a violation depends on your city/borough/township lighting ordinance. Many require lighting be arranged to prevent glare onto adjoining lots and streets.
East Hempfield Township Zoning, outdoor lighting standard
The applicant shall furnish expert evidence that all lighting of outdoor recreating areas has been arranged to prevent glare on adjoining lots and streets.
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