Abstract: A fluorescent light fixture is disclosed which comprises an elongate base plate member adapted to be mounted on a wall or other support and having inturned side flanges forming oppositely disposed channels for frictionally retaining marginal portions of the side walls of an inverted tray member which has a truncated triangle cross section and on the open ends of which are mounted lamp receiving sockets connected by wiring to a ballast member mounted on the inside of the tray. The tray member is of resilient material permitting the side walls to be contracted along the length thereof for insertion of the marginal portions in the side channels on the base plate member. The base plate member has end walls with portions bendable to a position over the ends of the support member to lock the latter in place and a readily detachable light diffusing lens member is provided for enclosing the assembly including a lamp mounted in the lamp sockets.