LimoStudio Barn Door Barndoor & Honeycomb Grid & Gel Set, AGG328-D (1) x barndoor: adjust Light Intensity, Facilitates shaping of the beam of light from the fixture, and prevent the distinctive scatter of light created (1) x honeycomb: Superior Control Support, Cuts down on Lens flare (4) x white, blue, yellow, red color gel: Correct Light Balance or Create Speical Light Effects