Ahh yes Paul,
So you have that same problem in the UK as well.
Regardless of any markings that a manufacturer will put on thier own gear, there will always be some idiot that thinks that they know better and throws a higher rated lamp in the fitting.
People don't seem to realise that fuses/CB's don't protect against thermal effects at fittings, until of course the bare wires short-circuit.
John,
Yes they do come in plastic versions, polycarbonate, to be exact.
We've extinguished a few porch fires caused by these sorts of fittings, the problem is with them being weather-proof, once you have the cover/diffuser screwed on it, there is no ventilation at all to get rid of the huge amount of heat that the incandescent lamps produce.
Leaving a light like this on for any length of time is just asking for trouble.
