These are replacement ballasts for Thin-Lite 12 volt DC light fixtures. If the diffuser and bulb in your fixture are still good, it makes sense to just replace the defective ballast. This ballast operates from a 12 volt d.c. battery based system and will operate two 15 watt (F15T8) fluorescent tubes.
NOTE: It is designed to operate TWO tubes, if used with one tube it will be damaged.
Ballast model - OIB-716
Fits Thin-Lite models: 716, 736, 746, 766.