Aputure PB3 Softbox and Aputure PB3 GridAputure INFINIBAR PB3 Rectangular LED Light Modifier Softbox with 45 Degree Grid for Filmmakers The Aputure INFINIBAR PB3 Softbox is a rectangular soft light modifier designed specifically for the INFINIBAR PB3 LED Pixel Bar. This modifier further diffuses and softens the PB3s light output, creating a compact 1 foot soft light perfect as a fill light for illuminating subjects such as people or products. The softbox also features a 45 degree Light