Garden LED Voltage

[meispete]

Hi there, I have 10 led lights in my garden all working off one transformer. This is the 3rd transformer I've tried with a similar output to the one I was provided with. At the moment when the power comes on, the bulbs light up dim, then get a little brighter, and brighter still, then the whole thing dies and it stays off for the rest of the night. I'm no expert but I'm sure the problem must be the transformer? What sort of output should I be giving to 10 LED's from the transformer so I can buy a new one and stop any more problems!

[seacrest]

Each LED is probably around 120mA so 10 will draw 1.2A....I reckon you need at least a 2A Power supply !

[buildersmate]

Most of the garden LEDs I've seen seem to be rated at about 0.5W each (several LEDs inside the single lamp). They work off 12V, which means they are more likely around 50mA each current drawn.
What is the power output of the Tx you are using? If the thing goes off after a while but comes on again the next day, it sounds like there is thermal overload protection on the Tx being invoked.