The ineffective way of using gun light to deliver light sign for aircraft with total radio failure or receiver failure

Ineffective use of gun light by Air Traffic Controller on aerodrome control tower unit. As we know based on International Civil Aviation Organisation Annex 2 rules of the air, ATC on TWR unit use gun light to deliver clearance to pilot when the radio is failed. The clearance given by the controller is a light sign. For example, if the controller gives sign steady red light, that sign has two meanings, for the aircraft is in flight completely different from the aircraft still on the ground. Unfortunately, using gun light on a daylight pilot find difficulties locating the signal lamp. The intensity usually not as bright as we need. This case pilot will try to find another thing besides solving the radio problem at the same time they still have to land the aircraft. ATC can’t use higher intensity cause that may be dangerous for people to use. Purpose this journal is to prove the ineffective way gun light use.