The Full Form of CFFL is Cold cathode fluorescent lamp.

A cold cathode fluorescent lamp (CCFL) is a lighting system that uses two phenomena: electron discharge and fluorescence. CCFLs are mainly used as light sources for backlights, because they are smaller and have longer lifetimes than ordinary fluorescent lamps. A wide range of brightness and color (color temperature and chromaticity) can be achieved by varying the type and pressure of the material injected into the glass tube, as well as the thickness and type of the phosphor used to coat the inner wall of the tube. CCFLs can also be formed into a wide range of shapes and sizes depending on the application.