A light emitting diode (LED) lighting fixture having an elongated casing, an array of LEDs mounted on a printed circuit board and a holographic film element providing a near lossless optical element for redistributing the light emission patterns from adjacent ones of the LEDs into an array light emission pattern wherein the emitted light in a region of the array light emission pattern is comprised of a sum of overlapping light emission patterns of a plurality of the LEDs. The casing is divided into a lighting element compartment containing the LED printed circuit board and holographic film element and a power supply compartment containing at least one power supply, each being thermally isolated from the other.