Light Center Length. The distance from the base of the bulb to the center.
The Light Center Length for HID lamps. This value is the distance in inches from the center of the arc discharge to a specified reference point on the lamp, usually the base.
LIGHT CENTER LENGTH. The distance between the center of the filament or arc tube in a lamp and a reference plane-usually the bottom of the lamp.
Light Centre Length (of a lamp)
Light Center Length. The distance from a specified reference point on a lamp base to its light center, typically expressed in inches.
The length, usually in inches, from a given point on the base of a lamp to its light center.