"alan" wrote in message ...

On 30/07/2013 19:12, alan wrote:


Go for the ones with a single led rather than the ones with multiple
LEDs.

Example taken at random from Ebay (possibly up to £10 cheaper from other
UK suppliers)
http://www.ebay.co.uk/itm/PIR-10W-20...em5 af15c1a64


Additional info

There is one gotcha with the cheap LED floodlights

They come pre-wired with around 1 foot of 3 core mains cable

The mains wire is relatively thin (outside diameter 5 to 6mm - it only has
to supply 30W) and therefore the bush into the back of the unit only
accepts cable of this diameter if you wish to replace the short length of
supplied cable.

The units can be easily dismantled and they have waterproof caskets between
mating halfs.

The back box on these lamps is relatively full of the mains to DC converter
and the mains cable is crimped to the input wires of the converter. There
may not be enough room to use a chock block if you want to remake this
connection. Soldering with heat shrink or re-crimping may be necessary.

Alternatively you may need a waterproof connector or box of some kind
to join your exiting wiring to the pre-wired floodlight.


That indeed may be a 'gotcha' . All my PIRs (14 at a quick mental count)
have an external waterproof switch across the PIR so that they can be turned
'permanently on' which involves a three core and earth cable entering the
back of the unit. Saves waving your arms around to keep the light on while
trying to hitch a stock trailer full of pigs

AWEM