I've posted a couple of questions recently on GU5.3 12v LED lamps.

Another thing I cannot quite get to grips with is the power supply.

In the screwfix catalogue it shows the following;

http://tinyurl.com/albmpj Voltage driver
http://tinyurl.com/atfp7m Current controller

What would be the reason for using either one or the other of these PSUs.

Geoff Lane