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That's for that minter, it was a rhetorical question, sort of tongue in cheek, a witty observation if you will, something to start the day off with a chuckle.
Anyway, as I said, thank you for your valuable input, much appreciated, however, I have never ever heard of the lights failing on any emergency services vehicle, if that had happened to any of my Ambulance drivers, I would have charged them for failing to carry out what's called in the Military a 'First Parade Service'