High output, low power consuming units offering tunable white light source. A special optical design provides single shadow rendering and adjustments over a range of correlated color temps. Since the Caster Series offers a Color Rendering Index (CRI) of 90, colors appear more vivid and lifelike on film and digital and media compared to other units that use single color white or RGB LED configurations. What truly makes these LED units unique is the shadow quality. Caster emulate a single source, which results in a single shadow. Therefore, the Caster Series can be effectively “cut” with a barn door or flag. These units have a mixing chamber, so all the color mix within the unit- providing a single course.