The LD11 din rail modules can be a little unreliable. I would use the LWM1. If you are going to use them with LED lights make sure the LED lights are dimmable. Also there is a 40W load minimum. Its possible to use in theory either mains dimmable LED bulbs or low voltage 12V LED bulbs but these will need a suitable dimmable transformer. Not all LED dimmable bulbs like electronic dimmers. So be careful.