After a frustrating online search, I want to query the group - is there a common bulb size in trailer/RV interiors? I want to upgrade to LED bulbs, and didn't know if TT's typically use one size, type bulb. Also, on outside lights, including tail light etc, are the bulbs the same or a different type?Thank you,Carl

Too many different RVs to make a general statement about bulb types.Just remove the bulbs you have and cross them over to the LED part.

Not that many types. Remove one by one and take a picture of each different type. Match to supplier...such as CW and Amazon. Advantage of CW store is they will assist.

Many of us just used the panel mounted LEDs.Cheaper, better, and they come with most any adaptors you would need to plug into your existing fixtures.

I would look at the base of the specific type of incandescent light, and do a general internet search for LED replacements. Pretty much switched out all my old lights, but it took a bit of searching since I had about 4 or 5 different types of bulbs.

Check here http://www.commandelectronics.com/ I Upgraded the exterior lights on my prior 5W. Tail lights were amazingly simple, came with new lens for the factory base.

Changing interior (and exterior) bulbs to LED? | Good Sam Community

Home_Skillet
Explorer II
Aug 28, 2017
Too many different RVs to make a general statement about bulb types.

Just remove the bulbs you have and cross them over to the LED part.
Lwiddis
Explorer II
Aug 29, 2017
Not that many types. Remove one by one and take a picture of each different type. Match to supplier...such as CW and Amazon. Advantage of CW store is they will assist.
Huntindog
Explorer
Aug 29, 2017
Many of us just used the panel mounted LEDs.
Cheaper, better, and they come with most any adaptors you would need to plug into your existing fixtures.
korbe
Explorer
Aug 29, 2017
I would look at the base of the specific type of incandescent light, and do a general internet search for LED replacements. Pretty much switched out all my old lights, but it took a bit of searching since I had about 4 or 5 different types of bulbs.
Edd505
Explorer
Aug 29, 2017
Check here http://www.commandelectronics.com/ I Upgraded the exterior lights on my prior 5W. Tail lights were amazingly simple, came with new lens for the factory base.
_1nobby
Explorer
Aug 29, 2017
cnp wrote:
After a frustrating online search, I want to query the group - is there a common bulb size in trailer/RV interiors? I want to upgrade to LED bulbs, and didn't know if TT's typically use one size, type bulb.
Also, on outside lights, including tail light etc, are the bulbs the same or a different type?
Thank you,
Carl

Well....the way I did it was to remove each lens and see if there was a BULB PART NUMBER label.
If not.....pull the bulb and look on line.

Typically...rear tail lights are 1157 equivalents. Some of the others are 1156.
Some interior are blade type. You really have to check them one by one. There won't be ant "kit" with your name on it.
_1nobby
Explorer
Aug 29, 2017
#1nobby wrote:
cnp wrote:
After a frustrating online search, I want to query the group - is there a common bulb size in trailer/RV interiors? I want to upgrade to LED bulbs, and didn't know if TT's typically use one size, type bulb.
Also, on outside lights, including tail light etc, are the bulbs the same or a different type?
Thank you,
Carl

Well....the way I did it was to remove each lens and see if there was a BULB PART NUMBER label.
If not.....pull the bulb and look on line.

Typically...rear tail lights are 1157 equivalents. Some of the others are 1156.
Some interior are blade type. You really have to check them one by one. There won't be any "kit" with your name on it.
Trackrig
Explorer II
Aug 29, 2017
It's really simple, just go to Amazon and type in 1156 LED and the LED bulbs needed for replacing the standard 1156 bulbs pop right up.

Most likely you'll need 3 - 4 different bulb to fit everything. Take the light bulbs out and type in a description like the above.

Bill
theoldwizard1
Explorer II
Aug 29, 2017
#1nobby wrote:

Typically...rear tail lights are 1157 equivalents. Some of the others are 1156.

1157 is a dual filament bulb used as a combination tail/brake/turn indicator light. 1156 is a single element bulb used as a reverse/backup light. Both use the same size bayonet base.

Be careful about LED replacements. They are very directional so if the socket/fixture is not pointing directly in the direction you want illuminated you may not like the results.

Modern vehicle tend to use similar bulbs (3056, 3057) with a different base.

The other auto bulb, originally used in dome lights and license plate lights, commonly used in RVs has a "festoon" base. A tube with contacts on each end
fallsrider
Explorer
Aug 29, 2017
Home Skillet wrote:
Too many different RVs to make a general statement about bulb types.

Just remove the bulbs you have and cross them over to the LED part.

That's what I did on Amazon.