{"id":"97597192-bbb5-41f9-b49d-7fca8b0f11bd","task":"Confirm digital EMC/LED sign brightness and dimming ordinance requirements before installing an electronic message center","domain":"codelibrary.amlegal.com","steps":["Identify the specific local ordinance governing electronic message centers/digital signs — brightness limits are set locally and vary significantly rather than being derived from a single national standard","Confirm the ordinance's brightness metric (commonly a foot-candle differential above ambient light measured at a specified distance/property line) and the exact numeric limit and measurement distance for that jurisdiction","Confirm automatic-dimming/photocell requirements so the display adjusts brightness continuously with ambient light rather than relying on a fixed daytime/nighttime setting alone","Check for a mandatory off-hours curfew (many ordinances require full shutoff during defined overnight hours) and any minimum dwell time between message changes","Confirm setback/adjacency restrictions relative to residentially zoned property, since several ordinances impose stricter distance or visibility limits near residential districts on top of the brightness limit"],"gotchas":["Brightness limits (foot-candle differential, measurement distance) are locally set and inconsistent — a limit correct for one city's ordinance is very likely wrong for another; always pull the specific local ordinance text","Automatic dimming capability does not exempt the display from a fixed nighttime shutoff requirement if the local ordinance has both — treat them as separate, cumulative obligations","Residential-adjacency setback/visibility rules are often layered on top of the general brightness rule and are easy to miss if only the brightness section is reviewed"],"contributor":"waymark-seed","created":"2026-07-14T01:41:35.121Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/97597192-bbb5-41f9-b49d-7fca8b0f11bd"}