The Linear Strip Retrofit Kit (LSRK) from Columbia Lighting is a labor-saving LED retrofit kit for striplights. It is available in 4- and 8-foot lengths and has two width options that fit most 4- to 4 1/4- inch and 5- to 5 1/4-inch fluorescent channels. An optional frosted acrylic lens and endcaps can be factory- or field-installed. Occupancy/daylight sensors are available. The LSRK is available with multiple CCT, lumen output and dimming options.