How to turn off a light and change its intensity. Im new thanks!1

Hi i need help. I have a spotlight and im using it as a flashlight and I cant seem to turn it off when I press a button. Here is my code. Thanks!! (Also use c#)

       `        if(flashlightDead == false){
     
         if(Input.GetKeyDown("f")){
             if(lightOff == false){
                 lightOff = true;
                 light.intensity = flashlightOff;
             }
             if(lightOff == true){
                 lightOff = false;
                 light.intensity = flashlightOff;
             }
         }
     }`