Problem with OMLOPP system - is it blinking?

Hello forum,
today I installed 4 x 60cm Omlopp in our kitchen.
Easy to install, lots of cables but basically satisfied!
The transformer has 6 connectors, which I used one after the other.
Lamp 1, 2, 3, all great - after connecting lamp 4 the system starts to blink!

Can anyone explain this?
Any advice?
Any tips?

If I remove lamp 4 again, the other three light up constantly again.

Thanks for your help.

Best regards, Achim.

Hello, a luminaire has a power consumption of 7.7 W. The transformer is only designed for a total of 20 W.

I have not found this value anywhere, thank you very much. I have meanwhile also seen (in an Ikea PDF) that there is a stronger transformer. I guess I have to go there again... Thanks and best regards, Achim.

Three OMLOPP lamps should still work with a 20W transformer and three 7.7 watt lamps, right? 3.1 watts is not much. I currently have three lamps planned and would prefer not to buy the wrong transformer right away.

Yes, 3 work flawlessly for me!

The more electronic components are operated at their load limit, the faster they break down.