What type of light switch are you using, just a bog standard toggle switch? When pressed up it stays in that position and when pressed down it stays in that position.
You may need to change parameter 20 to a value of 1.
Choose between momentary, toggle and roller blind switch.
Available settings: 0 – momentary switch 1 – toggle switch 2 – roller blind switch – two switches operate the Dimmer 2 (S1 to brighten, S2 to dim)
Default setting: 0
Parameter size: 1 [byte]
So I can also easily dim the lights up or down at the wall switch and in addition program double clicks and triple clicks to do things like run Vera scenes or control other none physically connected lights, like my side lamps.
I think ElCid is right about needing a Dimmable LED driver.
You also need to run the calibration routine, so it works out the connected load type.
Force auto-calibration
Changing value of this parameter will force the calibration process. During the calibration parameter is set to 1 or 2 and switched to 0 upon completion.
Available settings: 0 – readout 1 – force auto-calibration of the load without FIBARO Bypass 2 2 – force auto-calibration of the load with FIBARO Bypass 2
Default setting: 0
Parameter size: 1 [byte]
I set parameter 13 to 1 . I saved changes. The light switches itself on then off then I got an error message saying parameter failed to save. Parameter 13 shows 0.