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The LED Authority

Light Bulb Base Chart
Light bulb base types at a glance.
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Reference Charts

Light Bulb Base Chart

Click or tap on a base to view matching bulbs from our catalog.

Screw Bases

10mmMiniature Screw (E10) 11mmMiniature Candelabra (E11) 12mmCandelabra (E12) 14mmEuropean (E14) 17mmIntermediate (E17) 26mmMedium (E26) 26mmMedium Skirted 27mmEuropean Medium (E27) 39mmMogul (E39)

Fluorescent Pin Bases

Miniature Bipin Medium Bipin Single Pin Recessed Double Contact 4-Pin Single Ended, 4-Pin 2GX-13 Axial

Twist & Lock Bases

6.5mmG6.5 8.5mmGX8.5 10mmGU10 10mmGX10 24mmGU24

Bi Pin Bases

4mmG4 4mmGU4 4mmGZ4 5.3mmG5.3 5.3mmGU5.3 5.3mmGX5.3 5.3mmGY5.3 6.35mmG6.35 6.35mmGY6.35 6.35mmGZ6.35 7.9mmGU7.9 8mmGY8 8.5mmG8.5 9mmG9 9mmG9 Pin Blade 9.5mmG9.5 9.5mmGX9.5 9.5mmGY9.5 9.5mmGZ9.5 12mmG12 22mmG22

Bayonet Bases

Miniature Bayonet Double Contact Bayonet (BA15d) Single Contact Bayonet (BA15s) D. C. Bayonet, Medium (BY22D) Index Double Contact Bayonet

Wedge Bases

Wedge Wedge D.F. Wedge S.F. Recessed Single Contact RX7s Slide Wedge Subminiature

Compact Fluorescent Plug In Bases

2G7 2GX-7 2G11 G23 G23-2 G24d-2 G24d-3 G24q-1 G24q-2 G24q-3 GX23 GX23-2 GX24q-1 GX24q-2 GX24q-3 GX24q-4 GX24q-5 GX32d-2 GX32d-3

Miniature & Automotive Bases

Prefocus Right Angle Prefocus Axial Prefocus Axial Prefocus, Shielded Straight BA-7S BA20 Midget Flanged Single Contact Miniature Flanged Single Contact Miniature Single Contact P15-3 P15S P28S P32d2 P43T P43T-38 PK22s PX15D PX26d

Specialty Bases

G53 Festoon 2 Contact Lugs 3 Contact Lugs Screw Terminal (Multi Purpose) Mogul End Prong (GX16d) Metal Clip Rigid Loop Side Prong Lead wires S14s

Cable Bases