Question about TP-Link Tapo L530E (4-pack)

The light bulb can be switched on and off using the normal power switch, but this interrupts the smart functionality. To control smart functions such as dimming, colour temperature or schedules, the lamp should be permanently supplied with power and operated via the Tapo app or voice assistants. Switching on and off via the normal switch is therefore possible, but restricts the use of the smart features.

How much power does the light bulb need when it is switched off via the app?