The Barndoors, Grid, and Gel Holder for LS 120d II and LS 300d II LED Lights are light modifiers that fit the reflector that comes with all versions of these Aputure LED lights. The 4-way barndoor design allows for one to four of the leaves to be swung into the light's beam to illuminate areas that you want while keeping light from areas where you don't want it. The 30° grid narrows the beam spread. The barndoors also include a reflector, as well as a magnetic gel holder that allows filmmakers to easily add color to their lights' output.