Does not work in ceiling fans

I cannot get both generations of yeelight to work in my ceiling fan. It has spots for 4 bulbs. I tried putting them in one at a time and they refuse to even turn on. yes the power was on I had 3 regular bulbs receiving power just the yeelight wouldn’t turn on. I used the same method in my bathroom socket which is split into 3 and that one worked fine. please help.

Please make sure if bulbs have good power supply when you put them in at the same time.

they were receiving power. I had 3 regular bulbs and 1 yeelight jn and the 3 regular bulbs were powered. the yeelight one refusedto turn on. I used the same method when installing them into my bathroom socket except it was 2 regular bulbs and 1 yeelight and that one worked fine.

These lamps are powered directly or by an internal power brick?

it is powered directly by a switch on the wall.