Dimmer or Relay switch ?

Hi all,

I’m a newbie in the home automation and would like to understand what to buy for controlling my lights.
The type of bulbs are - CFL, LED and Incandescent.

Can I use the fibaro dimmer modules for all if I don’t have 3 way wiring or must I add the N wire and use the fibaro switch relay?
On and Off is good enough for me but I don’t know if the dimmers will do the job if I don’t have the N wire.