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).
Navy Commissioned and Warrant Officers Navy officers wear their rank devices in different places on their uniforms, depending upon the uniform. The three basic uniforms and the type of rank devices are: khakis (a working uniform) -- pins on the collar; whites-- stripes on shoulder boards; and, blues-- stripes sewn on the lower sleeve.