Night Light (Concorde). Shooting in L.A. Roger Corman, legendary producer of horror cheapies, gives ex-assistant Sally Mattison a go at directing with this tale of a group of teen-agers who are inconvenienced by a vicious killer lurking in their midst. Producer Catherine Cyran. Screenwriter Cyran. Stars Keely Christian, M. K. Harris and David Greenlee. Spring release.