One transmitter and 6 receivers remote control 6 lights in football field

My uncle is a football field administrator,who is looking for to remote control his 6 lights in the football field because he doesn’t want to switch the manual switches one by one in the control room. He really needs a set of rf long-range remote control system.
He wants to control 6 lights in the football field simultaneously like the following picture:

He asked a remote control system supplier whether there was some kinds of remote control products. The supplier offered this kind of product.

Each receiver has antenna so that it can receive the signal far away from the transmitter. The distance is about 1000m in an open ground. So it is quite favorable for football field.

According to his requirement, the supplier prepared 6 receivers to connected 6 lights separately.

Then the supplier showed him the wiring method and picture.

Wires from the light should be connected to A&B terminals of receiver. 12 DC power should power to the receiver.

He was told the usage of remote control kit.

Pressing the big button, 6 lights are turned on.

Pressing the small button, 6 lights are turned off.

After using this kind of remote controller, he will control those 6 lights in this football field at ease at night.