RibbonFlex Pro 24-Volt White CCT Tunable LED Tape Light from Armacost Lighting is an innovative custom color temperature lighting solution for any accent lighting installation, including under cabinet, bedroom, bathrooms, or living rooms. The Unique Tunable technology allows you to select shades of white from warm (2700K) to cool (5000K) using the Proline CCT Tunable White LED Controller (sold separately). These LED strip lights are designed to meet the layout and installation requirements of lighting professionals and feature high quality, professional-grade components that are longer lasting and create a premium look. Must be used with the Proline CCT Tunable White LED Controller (item 513020). Not compatible with AC Dimming.