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Identify Bulb Bases

Click Here to go Bulb Color Choice Page if you need help choosing bulb colors

Click Here if you want to go to our page that talks about Lumens and Quality

 

 BASE CROSS REFERENCE and IDENTIFICATION

BY BASE TYPE

M4 Part Numbers Begin

Bulb Cross Reference*

BA15S Single Contact Round 5/8” diameter

1156-3528.jpg

Click here for 1156- LEDs

 

replaces1156.jpg

 

Most Commonly Replaces 1141, 1156, 1003 in RVs

1003, 1073, 1095, 1141, 1156, 1156A, 1195, 12088, 1295, 1295NA, 199, 2396, 3497, 631, 7506, 93, 97, 97A, 97NA

BA15D Double Contact, Single Filament Round 5/8” diameter

1142-5050.jpg

Click here for 1142- LEDs

 

replaces1142.jpg

 

Most Commonly Replaces 1076 and 1142 in RVs

1056, 1076, 1142, 68, 90

(not compatible with a 1157 which is a dual filament bulb with similar contacts on the bottom.  1157s can be found in our Automotive section)

3/8” wide Wedge Base

921-5050.jpg

Click here for 921- LEDs

replaces921.jpg

 

Most Commonly Replaces 912 and 921 in RVs

904, 904NA, 906, 906NA, 912, 916, 916NA, 917, 920, 921, 922, 158, 160, 161, 161B, 168, 168A

168NA, 175, 193, 194, 194B, 194G, 194NA, 194R, 2821, 2825, 2827, 2886X, 3652, 558, 579, 658, W5WB

Bi Pin 3/16” apart

g4type1b.jpg

Click here for G4- LEDs

replacesg4.jpg

 

G4 / T3 / G6.35 / JC10 / JC20

SEE HOW TO MEASURE HALOGEN IMAGE BELOW

 

select-the-right-g4b.jpg

Festoon

211-2-led-bw2.jpg

Click here for 211- LEDs

festoonstandard.jpg

 

Measure length at clips and compare.  Festoons are typically measured in millimeters (mm)  Common sizes 32mm, 36mm, 42mm.  Festoon is any bulb where contact is made at both ends and the light is in between.

SPECIALTY BULBS    

 

03.jpg

Click here for 1383- LEDs

standard1383.jpg

 

Replaces 1383

Long Neck Mushroom

Also replaces any light with a BA15s base (see above) if it fits in the fixture.

 

1156hp4.jpg

Click here for 1156-4-HP- LEDs

1139standard.jpg

 

Replaces 1139, 1139LF (1139IF)

Short Neck Mushroom

Also replaces any light with a BA15s base (see above) if it fits in the fixture.

 *Always check the space in your fixture against the dimensions of the LED you are considering to ensure there is enough room.  Some LED equivalents will be slightly larger than the incandescent they replace.

 

Click Here to go Bulb Color Choice Page if you need help choosing bulb colors

Click Here if you want to go to our page that talks about Lumens and Quality