A filtering assembly for enhancing lighting from a luminaire serves as a lighting filter that includes one or more stackable and interchangeable filter devices. The filter devices are configured to detachably couple to a luminaire, and custom block a portion of the light transmitted from the luminaire. This enables a uniquely shaped transmission of light and/or removing unwanted spills and or glare emanating from the luminaire. The filter devices comprise a body that defines a clear section that allows full passage of light from the underlying luminaire, and an opaque section that allows partial or no passage of light. The filter devices also comprise an outer rim having a friction enhancing material that enables a snug engagement with the perimeter recess forming in the luminaire. The friction enhancing material of the outer rim restricts slippage when stacking multiple filter devices, and with the inside perimeter recess formed in the luminaire.