Submarine Mystery Questions of the Week - 03 MAR 2011

Background
Nuclear subs like their conventional counterparts utilize fluorescent lighting for general illumination. This has been true since the first U.S. nuclear sub, USS Nautilus (SSN-574), was launched over fifty-seven years ago. Anyone who has worked or lived in an environment of fluorescent tube lighting is probably aware of some major pros and cons.
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Mystery Questions of the Week
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1) - Name 2 advantages of flourescent lighting over incandescent.
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2) - Name 3 disadvantages of flourescents tubes in a submarine environment.
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3) - Identify an available alternative source of general illumination for the submarine environment.
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4) - How many commissioned Navy subs currently use the type of illumination identified in 3), and how long has the innovative illumination been installed in any commissioned submarine?
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Comments OFF ...... ANSWERS MONDAY, 7 March
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Submarines are always silent and strange.