DKS add-on directories and light kits are an ideal supplement to DKS telephone entry systems.   Add-on directories are typically used when electronic type directory systems are unavailable or don't make economic sense.   Three different directory models are available to meet your specific application.   Fluorescent light kits are typically used in applications were increased lighting on the telephone entry system or add-on directory is desired.   Fluorescent lighting provides exceptional visibility allowing easy use of the system at night.