Commercial/industrial is where my expertise/experience is. Inspectors will not allow lights and receptacles on the same circuit in any circumstance. NEC here in the states is interpreted locally. All receptacles will be on a 20 @ breaker with 12 gauge wire. Light circuits may use a 15@ breaker provided the wire is 14 gauge. We normally use 110 volt for office lights and receptacles. In Canada you use 230 eh?