A room filled with glowing fog; shadowy figures among glittering LEDs and warm ‘breathing’ columns of light. Welcome to the trip that is Light Show (until 28 April), the Hayward Gallery’s latest exhibition exploring how artists have used the medium of artificial light over the past five decades. With side effects of disorientation, slight panic and hallucinatory visions, this exhibition is an intoxicating sensory cocktail, plunging visitors into a world that is recognisable and unfathomable at the same time.