How to remove the glow from Spot Light

how to make the Spot Light not shine all the time […] I don’t understand how to turn off the Spot Light glow in the game, only to make the glow be called by pressing the F key ?

Start with the component not being visible and then:

it turns out that the character’s hands light up

  • either place it in front of the hands - the most convenient
  • or you can try using channels:

image

If the light is on channel 0, meshes that ignore channel 0 will not be lit. But then you’ll need to consider how other lights behave as well.