Abstract: A boxlight which serves as a source of light projected through a film transparency and focused on a photosensitive film in order to project the image on the transparency onto the film. The boxlight has an improved light source formed by pulsed xenon lamps arranged end to end to approximate a circle centered on the optical axis of the photoreproduction machine and contained in a plane perpendicular to the optical axis. Reflectors are provided in a circular arrangement extending around the light source circle and include reflective panels oriented at about 15.degree. to the optical axis. The circular configuration of the light counters cosine fourth losses and makes the light intensity pattern more uniform at the film plane.