Hello all.
Yes, 220v is better, as said before, Try to cut out every watt that you can.
There are the dimmable type LED lights, They however do require a special type of dimmer. I am currently busy with a supplier as alot of rooms have 3-4 lights, And the load is to little for the dimmer. With the fact that the LED's are alot brighter now than before.people wanna dim it.