Uses of neon gas:

(i) It is mixed with helium to protect electrical equipments from high voltage. 

(ii) It is filled in discharge tubes with characteristic colours. 

(iii) It is used in beacon lights.

Uses of Argon gas:

(i) Argon along with nitrogen is used in gas-filled electric lamps. This is because Ar is more inert than N. 

(ii) It is usually used to provide an inert temperature in a high metallurgical process. 

(iii) It is also used in laboratories to handle air-sensitive substances.