|
Base type
|
L.C.L Reference
Plane Location
|
|
All screw bases (except
Mini-Can)
|
Bottom of base
contact
|
|
Mini-Can
|
Diameter of ceramic
base insulator is .531 inches
|
|
3-Contact Medium
|
Bottom of base
contact
|
|
Mogul Medium Prefocus
|
Top of base fins
|
|
Mogul Prefocus
|
Top of base fins
|
|
Medium BiPost
|
Base end of bulb
(Glass lamps)
Bottom of ceramic
base (Quartz lamps)
|
|
Mogul BiPost
|
Shoulder of posts
(Glass lamps)
Bottom of ceramic
base (Quartz lamps)
|
|
2-Pin Prefocus
|
Bottom of ceramic
base
|
|
S.C. or D.C. Bayonet Candelabra
|
Top of base pins
|
|
Medium Bayonet
|
Top of base pins
|
|
S.C. or D.C. Prefocus
|
Plane of locating
bases on prefocus collar
|
|
Medium 2-Pin
|
Bottom of metal base
shell
|
Wednesday, January 4, 2012
Light Center Length (L.C.L.)
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.
