10. Hours of Operation. Except as may be deemed appropriate for site safety or
10. Hours of Operation. Except as may be deemed appropriate for site safety or security, all external lighting, including lighting accessory to authorized signs, shall be extinguished or shall provide reduced illumination levels one half hour after the facility is closed for the business day. Such lighting may be pre-timed to resume one half hour prior to the arrival of the first employee on the premises.