Definitions for "Light Center Length"
Keywords:  filament, arc, lamp, plane, center
The distance from the base of the bulb to the center.
The distance between the center of the filament or arc tube in a lamp and a reference plane-usually the bottom of the lamp.
The distance between the center of the filament, or arc tube, and a reference plane - usually the bottom of the lamp base. Refer to the following chart for reference plane locations.