Abstract
The present study explored light pollution as it may be produced by on premise identification signs. More than just “storefront” signs, on premise identification signs can also be found on the property of professional offices, financial institutions, corporate headquarters, governmental agencies, and medical offices. The present study did not examine off premise signs, such as billboards or outdoor advertising. Relevant literature and light pollution standards as they pertain to on premise sign lighting were reviewed and photometric measurements were taken of light emitted by in-service on premise signs representative of the various sign illumination modes and sign designs employed by the on premise sign industry. Data were collected on 58 internally illuminated, externally illuminated, neon, and channel letter signs. While there were some particularly bright signs, the majority of the signs tested fell below the photometric levels believed to be associated with light pollution.
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