Our most powerful soft fill light source, the 4BL455 is a new and improved version of the 2BL455 fixture. Improvements include single lamp per reflector design for a more efficient,more powerful (80 fc at 10'), and more evenly distributed light output. The 4BL455 offers bank-switchability (on FUL and DIM models only) so that you can operate the outer two lamps only, the inner two lamps only, or all four for maximum effect. Aluminum construction yields a lower fixture weight of only 11 pounds. And the moveable nut plates enable vertical or horizontal mounting flexibility. The beam angle on the vertical axis is 53°, 100° on the horizontal.