Learning Center 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) 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 10mmGU10 10mmGX10 24mmGU24 Bi Pin Bases 4mmG4 4mmGU4 4mmGZ4 5.3mmG5.3 5mmG5 5.3mmGU5.3 5.3mmGX5.3 5.3mmGY5.3 6.35mmG6.35 6.35mmGY6.35 6.35mmGZ6.35 8mmGY8 8.5mmG8.5 9mmG9 9mmG9 Pin Blade 9.5mmG9.5 9.5mmGX9.5 9.5mmGZ9.5 12mmG12 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. RX7s Slide Wedge Subminiature Compact Fluorescent Plug In Bases 2G7 2GX-7 2G11 G23 G24d-2 G24d-3 G24q-1 G24q-2 G24q-3 GX23 GX23-2 GX24q-1 GX24q-2 GX24q-3 GX24q-4 GX24q-5 Miniature & Automotive Bases Prefocus Right Angle Prefocus Axial Prefocus Straight Midget Flanged Single Contact Miniature Flanged Single Contact Miniature Single Contact P15S P28S P32d2 P43T PK22s 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 MALE FLAT FEMALE FLAT PK30d Miscellaneous Bases GU6.5