My bathroom is fitted with six traditional 20W GU5.3 / MR16 bulbs, and I want to replace them with the smart home equivalent. The only one I could find with the same socket type is the 5W Osram Smart+ GU5.3 bulb.
I bought three of them (to start with), but when I put the bulb in, and flip the switch, the bulb either flickers erratically for a few seconds, or does not turn on at all. This doesn't look like deliberate behaviour.
All three bulbs do the same, they do it in each of the six sockets, and they do it even when all the other conventional bulbs have been removed. However, with an external power source, I was able to test the bulbs, and they all work perfectly, so they're not duds, either.
The bathroom has a regular switch, not a dimmer switch.
What could be causing this issue? How do I resolve it?