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Rowlett planners review proposed residential lighting standards, measurement rules
Summary
City planning staff presented proposed changes to Rowlett's lighting code April 14, urging clearer definitions, a 0.25 foot‑candle benchmark at residential property lines, and photometric requirements for enforcement.
City of Rowlett planning staff briefed the Planning and Zoning Commission on April 14 on proposed amendments to residential lighting standards that would add definitions, measurement methods and clearer enforcement steps.
Senior Planner Michael King told commissioners the presentation responds to a January City Council request and council direction to consider a 0.25 foot‑candle limit at residential property lines. King said the draft seeks to keep much of the existing code to avoid declaring numerous properties nonconforming while adding photometric definitions, cut‑sheet requirements and a computation method to enable consistent field enforcement.
The staff presentation detailed photometric terms — lumens, candelas, luminance and illuminance — and explained measurement practice: a calibrated light meter at eye level on the property line, a procedure to subtract ambient light, and reliance on manufacturer photometric data submitted with permits. King said the changes would give code staff an objective basis to investigate complaints and verify whether installations match approved plans.
King compared Rowlett’s draft to nearby ordinances, noting Mesquite and Plano use a 0.25 foot‑candle property‑line limit while Garland’s code allows higher property‑line intensity and focuses more on fixture design and lighting types. He said Plano pairs pre‑construction engineering calculations with field measurements, an approach staff considered for Rowlett.
Commissioners asked about exemptions for short‑duration motion‑activated lights, holiday/seasonal lighting and security installations. King said decorative strings and seasonal bulbs would be limited by lumen output (staff proposed a 200‑lumen threshold for small decorative lamps) and that security lighting and other exemptions would be explicitly addressed in the draft. He emphasized the proposal is not retroactive; staff would not require immediate changes to existing lawful installations but would rely on the permit and photometric data for new construction.
Staff requested direction on definitions and enforcement steps; commissioners did not vote on an ordinance at the meeting but directed staff to return with a draft ordinance that incorporates the measurement protocol, cut‑sheet/photometric documentation requirements and clarified exemptions for seasonal and security lighting.
“Council recommended changing the ordinance to include a standard of 0.25 foot candles at the property line,” King said during the presentation, citing council direction. The commission asked staff to refine the draft for a future public hearing and formal action.
