Their unique shape and high reflectivity improve light focus from the fixture into the workplace. They are especially useful on overlit facilities.
Fluorescent lamps emit light in all directions from the tube, including up into the fixture.
Optical reflectors are designed to reflect the wasted light downward, as shown in Figure 1, and are best suited to applications with horizontal visual and work surfaces, such as offices. Reflectors can be installed in two or four lamp fluorescent troffers, or in common strip-light fixtures. Energy is saved by delamping a portion of the lamps in each fixture. Since they must remain clean to be effective, reflectors should not be used in industrial-type open strip fixtures where they are likely to be covered with dust. Fewer lamps generate less heat, so cooling costs are lowered.