Standard building hours for lights and HVAC are 7:00 a.m. to 6:00 p.m., Monday through Friday. Tenants may request after-hours lights and/or HVAC by calling Security/Life Safety at 918.573.4722. Be prepared to provide name, company, phone number, floor and office location, duration that lights and/or HVAC should be scheduled, and a cost center or employee id. After-hours HVAC is billed a $12.50/fan hour; there are two fans per floor in the BOK Tower.