Paul,
Good topic mate.
Me and a friend of mine were talking about this very thing today.
OK, I'm aware of the Food Safety Regulations here in NZ, where you have to have all of your fluorescent tubes within a protective tube, in case of breakage of the lamp itself, where that tube is over the top of saleable food products.
Ray,
I'm reminded of a situation in Timaru recently where a single-phasing Air Con unit on a roof caused a few tubes to drop out of thier fittings.
Luckily (whichever way you look at it) the lamps never fell in to any food products, but did catch a pensioner quite unawares.
A defibrillation unit was needed. [Linked Image]
I will see if I can get a link to the company that makes these tubes, made to fit T8 tubes.