On Tue, 30 Jul 2013 12:54:05 +0100, Brian Gaff wrote:

I wonder why they don't make such things of a durable plastic?

Heat sink for the LED and/or power supply.

Having screws that rust does seem a little short sighted.

The cheapo halogen floods are not much more than a bit of painted
pressed steel, they are made down to a price...

The 10 W single chip IP65 800 lumen LED floods that CPC sell have
stainless steel screws and 1 m of lead. LA04484 £15.45 + VAT.

--
Cheers
Dave.