A modular track light emitting diode (LED) lighting assembly is provided for improved product lighting in display cases, including refrigeration applications. The modular track LED lighting assembly has a series of LED, including one or more flat LED arranged at an angle to form a lighting spine. In a specific inventive embodiment, the one or more flat LED are arranged at a forty five degree angle. Embodiments of the modular track LED lighting assembly may be configured with a single sided series of light sources or single lighting spine for installation on corners or shelves, or with a double sided series of light sources or lighting spines for mounting on mullions between doors of a display cabinet. The lighting assembly may be powered via battery, or via an alternating current (AC) source that is converted to a direct current (DC) voltage.