That's how a smart bulb works. You turn it on and off via the app/digital assistant.
I have what looks to be the same bulbs but with what I believe are hundreds of different brands sold; these will be straight out of Shenzhen.
In this case therefore a 'smart switch' is substituting for a traditional switch, so instead of breaking the live wire to the light as with a traditional switch, instead the switch is essentially an 'always on' WiFi client, where pressing the switch is programmed to send an 'off' signal to a specific bulb, or group of bulbs.
The big problem with so-called smart lights is that turning lights on and off via a smartphone is actually incredibly stupid a lot of the time, in that the affordance of a light switch is much better. So in your case you have several possible solutions:
- fish out your phone from your pocket (?) and tell it to turn on/off your light
- invite Jeff Bezos (or Google) to record your every waking moment with one of their plug-in devices which listens for commands, so in this case 'Alexa turn off the kitchen light' works as long as you have one of these devices in every room (note: you can probably set your phone to listen for such commands as well, so you might be able to get it to work in your pocket)
- source some kind of Android device, such as a smartphone, which you use purely as a switch, perhaps with the app open all the time.
- install a smart switch.
Your smart switch is straight-out-ofShenzhen with minimal or no compliance testing. This one is NOT what you want as this essentially is a circuit breaker for traditional dumb bulbs, and in this case it will likely breach your electric regulations in that it is not earthed either.
Here your bulbs are very cheap Chinese types; for the 'smart bulb smart switch' you must consider the protocol. There are:
- Philips Hue
- Wifi - myriad implementations
Yours are listed as Tuya, which is very common. This uses the 'SmartLife' app, which unfortunately is OEM and given a useless overlay of 'Denver' or whatever by the reseller, so it's not as transparent what you're actually using as it could be.
The actual switches are listed on the Tuya website
but you will have to buy one with some random brandname on it - Denver don't seem to have put their name on one. There are two main solutions direct wifi (however I can't see whether this actually exists), and Zigbee. Zigbee uses 1/4 of the power of wifi, so the Zigbee switch, which will require a separate (plug-in) Tuya -> Zigbee hub, can just be stuck on a counter or taped to the wall, since it takes only a button cell battery.
And once you install the Tuya Zugbee hub you can use something like this https://zigbeealliance.org/zigbee_products/zigbee-remote-control-zyct-202/
There is also a protocol with various libraries such as this one
and checkout e.g. more general projects such as https://www.home-assistant.io/