LED lights and Fibaro FGD - 211 dimmer - NON working example

Other Devices & Integrations Lighting & Load Control
1

Hi,
I know there are plenty of topics on dimming LED lights, I just wanted to share my experience and I’m relatively pleased with the results

scenario:
1 x Fibaro FGD - 211 v2.2 controlling 4 x Philips MASTER LEDspot MV 5.5w GU10 (55x50mm) (22watts total)
1 x Fibaro FGD - 211 v2.2 controlling 8 x Philips MASTER LEDspot MV 5.5w GU10 (55x50mm) (44 watts total)

Initial observation: no flickering with default device settings (20=110, 12=99, 13=2) but the dim level got to it’s max at approx 60-70%
I found that setting the variable 20 to 134 - 138 did nothing (there was no flicker anyway) apart from affect the min dim level (10% turned the LED off whereas 20 = 110 10% illuminated the LED).

So I have the following settings that appear at first glance (an hour or so) to be stable and give me full dim range from min to max:
20 = 110
12 = 60
13 = 2

note: the above are 3-wire connected with no by-pass FGB001. I’ve tried cheaper brands of LED GU10’s in the past and had major flickering problems so it’s branded from now on!

Hope this helps someone.

2

I’ve only just noticed (it’s now dark so I can see the light levels better) that with both dimmer modules set the same, the one that has the 8 LED lamps does not dim to the same level as the one with the 4 LED lamps. Guess I need to cutomise each module based on the load levels or try putting a by-pass module on the one with the 4 lamps to increase its load.

3

update: I noticed last night that with both dimmer modules (DIMMER A with 4 lamps @22w and DIMMER B with 8 lamps @44w) set to the same parameters the minimum dim level on DIMMER A was a lot lower than that of DIMMER B and there was minor flicker on DIMMER B

Why would the load level affect the minimum dim level?

4

still no idea WHY the minimum dim leves should be affected by load and failed to adjust DIMMER A and DIMMER B so as they behave the same so decided to put all LED GU10’s (66w) onto one dimmer module with the caveat that If I ever go back to halogen, the max wattage would be 35w/lamp.
To get a decent minimup dim level I changed param 20 to 136 and had to increase param 13 to 20 to prevent the lights from turning off completely.

So now I have a working system
20 = 136
12 = 99
13 = 20