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).
Standing warrant officers. 1  the boatswain: responsible for maintenance of the ship's boats, sails, rigging, anchors and cables; 2  the carpenter: responsible for maintenance of the ship's hull and masts; 3  the gunner: responsible for care and maintenance of the ship's guns and gunpowder.