Best way to control a lamp by wireless

Hi. I want to control a lamp by a sensor for example nrf24l01. but It needs to a MCU.
What is the simplest and cheapest way to control a lamp.
Very thank you.

What is the simplest and cheapest way to control a lamp.

Lack of detail makes answering difficult. Must it be wireless? What lamp? What sensor? How far?

pushbutton keyfobs.

Lack of detail makes answering difficult. Must it be wireless? What lamp? What sensor? How far?

Yes it is wireless, a simple lamp by 220 v voltage, NRF24L01+.