Bulb Lookup

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Pick the base and contacts that match your bulb

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Check for contacts on bottom and pins on side to guide you

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Bayonet style bases

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

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BA15S aka 1156

Double Contacts on base and pins are straight across from each other

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BA15D Base

Double Contacts on base and pins are straight across from each other

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BA15D

BAY15 base offset pins aka indexed or offset base with 1 high and 1 low

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BAY15 Base

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Bayonet type

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

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BA15S aka 1156

Double Contacts on base and pins are straight across from each other

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BA15D Base

Double Contacts on base and pins are straight across from each other

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BA15D

BAY15 base with offset pins shown also known as an indexed base

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BAY15 Base

BA9S is a small bayonet about the size of a pen barrel

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BA9S Base

1157 Base has 2 positive contacts

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1157 Base

1157 has 2 contacts but both are "plus" & the case is minus

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1157 2 step light:

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 has 2 pointed Contacts one on each end that fit in to a holder

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T10x31 up to 44

Barrel type festoon has 2 contacts on each end but they are flat or in- dented

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T10x44P or B

The smallest of the festoons is 31mm or 1 3/8 in long with 2 contacts

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T10x31 Size

G4 has 2 pins on the side that are 9mm or 3/8ths spacing

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G4 or Bi-Pin

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MR type

MR 11 has 2 pins with a 5mm spacing and is smaller than the MR16

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MR11

MR 16 has 2 pins with a 9mm or 3/8ths spacing

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MR16

GU 10 base has 2 lugs is common in track lighting

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GU 10 Base

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

Wedge Base or T-10 has 2 wires for contacts

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Wedge Base

T 10 base has 2 wires is common in message signs

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T 10 Base

T-20 Base has 2 wires for contacts bent over wedge

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T 20 Base

3156 Wedge Base has 4 wires exposed & bent over wedge

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3156 Wedge Base

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Screw type

E27 is the standard light bulb base

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E27 Base

Light bulbs of the regular size base

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Screw in Light Bulb

Small E10 Screw Base (10mm) Dim.

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E10 Base

C9 or Intermediate Base

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Intermediate Base

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

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BA15S aka 1156

Double Contacts on base and pins are not offset

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BA15D Base

Double Contacts on base and pins are straight across from each other

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BA15D

BAY15 base with offset pins shown also known as an indexed base

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BAY15 Base

Bayonet type

BA9S is a small bayonet about the size of a pen barrel

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BA9S Base

1157 Base has 2 positive contacts

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1157 Base

1157 has 2 contacts but both are "plus" & the case is minus

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1157 2 step light:

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

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BA9S 1/2 Watt

LED Strips

Round 5 LED Lights good for walkways

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HL-5LED

6" Strip with 12 LED Lights good for under counter

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HL-12LED

24 LED Lights good for accent Lights

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HL-24LED

40 LED Lights good for replacement of florescent fixtures

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HL-40LED

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Types of Fixtures

This will use a BA15D bulb base

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BA15D Base

BAY15 base is used in this Auqa Signal #40 Tri Color

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BAY15 Base

Dbl contact Bayonet Base (15mm) Dim.

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Ball Fixtures

Dome lights can use Dbl contact bases

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BA15D Base

Housing types

BAY15 base is used in this Aqua Signal #40

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BAY15 Base

Florescent bulb fixture can use a strip light

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Strip lights

Halogen Puck lights use a G4 bulb

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G4 Base

Track Light use a MR16 Bulb

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MR 16 Base

Types of Fixtures

This will use a MR16 bulb base

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MR 16 Base

T10X31 Festoon is used in this Perko Fig71 Fixture

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T10X31 Festoon

T10X31 Festoon is used in this Perko Dome

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Dome Running Lights

Newer Dome lights can use G4 Bulbs

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G4 Base

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