A fluorescent lamp converts electrical energy into useful light much more efficiently than incandescent lamps. The typical luminous efficacy of fluorescent lighting systems is 50â100 lumens per watt, several times the efficacy of incandescent bulbs with comparable light output.
The Royal Australian Navy rank of warrant officer (WO) is the navy's only rank appointed by warrant and is equivalent to the army's WO1 (the equivalent of the army's WO2 rank is a chief petty officer).
The warrant officer program was reconfigured in 2002 largely to enable the U.S. military to retain senior technical personnel by paying them at officer grades. Warrant officers tend to have specific technical responsibilities, and not the more general management duties of commissioned officers.