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).
They are commissioned as officers by the President, with the advice and consent of the Congress, and serve indefinitely, at the pleasure of the President. Warrant officers are technical experts and specialists, officers who are not assigned to command positions, and who have warrants to serve.