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Pick the base and contacts that match your bulb
You are Here : Home >  Bulb Lookup
Check for contacts on bottom and pins on side to guide you
 
Bayonet style bases

BA15S

Single Contact on base and pins are straight across from each other

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BA15S aka 1156
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BA15D
Double Contacts on base and pins are one high and one low or offset
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BA15D Base
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BA15D
Double Contacts on base and pins are straight across from each other
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BA15D

BAY15D
BAY15 base with offset pins shown also known as an indexed base
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BAY15 Base
 
 
Bayonet type

BA9S
BA9S is a small bayonet about the size of a pen barrel
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BA9S Base
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1157
1157 Base has 2 positive contacts
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1157 Base
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1157
1157 has 2 contacts but both are "plus" & the case is minus
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1157 2 step light:

BA9S
A BA9S bulb like the others but in a 1/2 Watt power level
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BA9S 1/2 Watt
   
 
Festoon type

Festoon
Festoon has 2 pointed Contacts one on each end that fit in to a holder
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T10x44P
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Barrel Festoon
Barrel type festoon has 2 contacts on each end but they are flat or in- dented
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T10x44B
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festoon
The smallest of the festoons is 31mm or 1 3/8 in long with 2 contacts
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T10x31

G4
G4 has 2 pins on the side that are 9mm or 3/8ths spacing
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G4-14 LED
 
 
MR type

MR 11 Lamps
MR 11 has 2 pins with a 5mm spacing and is smaller than the MR16
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MR11
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MR 16 Lamps
MR 16 has 2 pins with a 9mm or 3/8ths spacing
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MR16
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GU-10
GU 10 base has 2 lugs is common in track lighting
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GU 10 Base

G4 Lamps
Xenon Bi-Pin / G-4 Base bulbs are most common for small fixtures
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Bi-Pin / G-4 Base
 
 
Wedge Base Type

T10
Wedge Base or T-10 has 2 wires for contacts
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Wedge Base
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T-10
T 10 base has 2 wires is common in message signs
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T 10 Base
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T-20
T-20 Base has 2 wires for contacts bent over wedge
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T 20 Base

3156
3156 Wedge Base has 4 wires exposed & bent over wedge
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3156 Wedge Base
 
 
Screw type

E27
E27 is the standard light bulb base
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E27 Base
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BAY15
BAY15 base with pins shown
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BAY15 Base
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E10 Lamps
E10 Screw Base (10mm) Dim.
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E10 Base

C9 Interme
C9 or Intermediate Base
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Intermediate Base
 

 
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