An LED light fixture including a housing portion and a base together defining an open space therebetween permitting air/water-flow therethrough. The housing portion forms a chamber enclosing at least one driver. The base extends from the housing portion and supports at least one LED illuminator outside the chamber. The housing portion and the base may each be formed as part of a one piece with the open space along at least three sides of the base. Alternatively, the base may be a separate structure secured with respect to the housing. Such base may be a single-piece extrusion supporting a plurality of LED modules or comprise a plurality of extruded heat sinks. Each heat sink may support one or more LED modules.