Cheap and Cheerful Smart light bulbs?

i am looking for bayonet and GU10 bulbs.

I have RF switches, they can not report their state to HA so i was thinking if i could get some cheap smart bulbs that are controlled locally i could use the “unavailable” state to detect if they have been turned off at the wall.

What about some smart switch that can report to HA like Sonoff? Otherwise IKEA has some pretty cheap smart bulbs that integrate with HA.

I’m in the UK with no neutral, so RF was the only option for switches. I’ll check out the IKEA lights, thanks

Edit IKEA only have Edison bulbs no bayonet, stupid Edison