YOU are the OP. You are free to ask questions but it is rude to dismis correct answers. Nothing I said was irrevalent. You were trying to use the wrong device and we're getting flickering and I told you why. It was on topic and not twaddle but correct facts.
But that is also incorrect, the device was not wrong, you can use LED lamps with transformers be they wire wound or electronic. The instructions with the Lidi LivarnoLux lamps detailed exactly what to do, OK some poor English, but it did show the problem and how to solve it. The picture of 3 x 3W with a 10 - 80 VA supply showed it being wrong, and the picture of 4 x 3W with a 10 - 80 VA supply showed it as right, maybe far better than any discription.
It really does not matter if I call it a transformer, a power supply, a driver, or a box of tricks, all that matters is the reader knows what I am talking about.
The BIG problem is two names for what is nearly the same thing. We buy a lamp maked as 5W but the box of tricks which supplies it is marked 10VA.
Being perdantic then volts times amps times power factor correction = watts. But power factor correction is some where near unity, so for the man in the street VA = W. And this is the problem, the guy does not need a detailed explanation on how the current wave form and voltage wave form may not match, all he needs to know is.
Total watts of bulbs must be within the two limits expressed as VA on the box of tricks. Simple, no need to use words like driver, switch mode power supply, pulse width modulated, AC, DC, transformer, or electronic transformer.
The box of tricks needs to match the total wattage of lamps connected to it, neither is right or wrong, no one said the hole should have been round and your digging it square, but that silly guy with the bollerhat. And the song writer knew what to do with silly guys, he burried them.