Spitlight, Light projector at Enter Museum, Solothurn, Switzerland

The Spitlight (P.300.S) is a mobile outdoor projector built by Swiss engineer Gianni Andreoli in 1955/56 and mounted on a Bedford truck that carried a generator on a trailer. Its carbon arc lamp, a Super-Ventarc type made by Dr. Edgar Gretener AG, produced 375,000 lumens. Milled metal stencils called gobos were projected up to six kilometres, giving an image one kilometre wide, with two drum magazines holding 30 stencils each.

A Swiss engineer developed the device in the 1950s and presented it at the Winter Olympics. Since then it has been used for large events and public demonstrations.

The name Spitlight is a brand name coined by engineer Gianni Andreoli for his P.300.S projector; it does not describe the beam's shape. The device became a Guinness World Record holder in 1985 as the largest projector in the world. Visitors can see it at the Enter Museum in Derendingen, where it is one of the central objects.

The Spitlight is now displayed at the Enter Museum in Derendingen, where it was moved in December 2023. The museum opened at this location on 1 December 2023. Visitors can see the projector as part of the exhibition; the museum focuses on computers and consumer electronics.

The beam becomes so hot that it can ignite cigarettes, a surprising side effect of its enormous light power. To create artificial clouds when natural ones are absent, ammonium chloride is used.