Hi,
We have done some testing on the unit now and it is not good. The driver gets too hot. The steady state temperature is reached after 45 minutes and is 50 deg C on the top of the casting above the driver. The baseplate is too hot to touch. Even if the unit remains electrically stable, at that temperature it would damage the furniture it is on. The two units we have tested give similar results.

Clive - your suggestion of a wall wart or separate power supply like this one http://www.ultraleds.co.uk/white-60w...ed-driver.html is looking the most sensible way forward and I will be talking to ultraleds on Monday.

Cheers

R