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You are here: Home / Excellent LED light replacements for 921 bulb wedge style RV incandescent bulbs

Excellent LED light replacements for 921 bulb wedge style RV incandescent bulbs

Last updated on June 21st, 2019 at 09:38 pm

RV52 Table of Contents FOR THIS PAGE!!! CLICK to Navigate!

    • How incandescent lights work – very very simple explanation
    • How LED lights work – very very simple explanation
    • RV52 editor explaining in his own words more on LED lights
  • Acceptable led light replacements for rv lighting 921 bulb wedge style
    • LED wedge lights RELATED listings
    • 46 Search Results for RV Lighting LED
    • Search Results
    • Potentially Related Posts for RV Lighting LED
    • Videos related to RV Lighting LED

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921 bulb replacement information can be found in this short article.

I’ve actually installed these replacements in my RV and can truly speak about them truthfully.

So please take advantage of my experience  – for example – you can’t ignore the lumens value!

The light bulb we are trying to replace is called a 921 light bulb with a “wedge style base”.

Here are some 921 bulb specs that you might find interesting. This bulb runs on 12 Volts DC (all/most RV systems operate on this system).

This 921 bulb in the wedge style consumes about 18Watts of electricity. I’m thinking this puts out about 280 lumens (hard to find GOOD data on this). So the efficiency of this type of bulb is 15 Lumens per Watt, which is fairly low for an incandescent.

921 bulb 12 volt wedge base light
The venerable 921 bulb used in most RV

921 wedge style light

18 Watts doesn’t sound like much, but when you are boondocking and running 10-15 lights you can consume 200 Watts which will drain your battery fairly quickly.

How incandescent lights work – very very simple explanation

For the technical person the way the incandescents work is that they heat a filament in glass bulb and the filament will then radiate light from the heated filament. Since energy is comprised of BOTH heat and light and the 921 bulbs get VERY hot, common sense will tell you that this large portion of heat is simply wasted energy. Or worse, in the summer, it will make your air conditioner work harder.

How LED lights work – very very simple explanation

LED lights work VERY differently. Without getting too technical, the way the material is constructed causes an interesting microscopic (actually smaller still) structure. When electricity is applied to the structure, the electrons “jump around” in such a way that they will emit a photon of light. Since there are zillions of electrons working hard there are zillions of photons which means lots of light for you. The SUPER COOL idea is that this really does not cause any heat to speak of.

RV52 editor explaining in his own words more on LED lights

simple explanation of why LED lights are more efficient than incandescent

The application I FIRST tested the LED replacements is pictured here. Notice that any light only needs to send out light in a half circle (180 degrees) :

921 wedge bulb in application for 180 degree LED light
921 wedge bulb in application for 180 degree LED light

Acceptable led light replacements for rv lighting 921 bulb wedge style

Find the replacements by running this easy part selector.

I spent LOTS of time on this selector guide. It is FREE and costs you nothing and SAVES you time!

rv led lighting easy selection guide g4 wedge
rv led lighting easy selection guide g4 wedge

RV LED Selector Guide

LED wedge lights RELATED listings

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46 Search Results for RV Lighting LED

Search Results

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Lighting
LED

Base: Wedge 180 degree Pure White 2.4 watts

GRB 921 Replacement LED Bulbs

GRB 921 Replacement LED Bulbs LEDAmazonCompare and Save!
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Base: Wedge 180 degree Warm White 4.8 Watts

GRB 20pT10DJY24L35-ww

GRB 20pT10DJY24L35-ww LEDAmazonCompare and Save!
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Base: Wedge 360 degree Warm White

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AUTOUS90 FBA_20Xt10-42-WM LEDAmazonCompare and Save!
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Base: Wedge 360 degree Xenon White

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AucanLed AucanLed040A LEDAmazonCompare and Save!
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Base: Wedge 360 degree Warm White 1.8 Watts

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Base: Wedge 360 degree Cool White 1.5 Watts

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Base: Wedge 360 degree Natural White 3.5 watts

SRRB T10-2835-3_5W_RV

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Base: Wedge 180 degree Warm White 2 Watts

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Base: Wedge 180 degree Warm White 3 Watts

GRV TC-2450w-10

GRV TC-2450w-10 LEDAmazonCompare and Save!
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Base: Wedge 180 degree Pure White 4.8 Watts

Debonauto T101stp-283524

Debonauto T101stp-283524 LEDAmazonCompare and Save!
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Base: Wedge 360 degree Warm White 3 Watts

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Maker Group B0797R11PZ LEDAmazonCompare and Save!
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Base: Wedge 180 degree Natural White 2.4 Watts

aibee T10-42L-SoftWhite-20p

aibee T10-42L-SoftWhite-20p LEDAmazonCompare and Save!
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Base: Wedge 360 degree Pure White 2.4 watts

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Debonauto T15 24SMD LED LEDAmazonCompare and Save!
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Base: Wedge 180 degree Cool White 2.5 Watts

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GRV TC-2428CC-10 LEDAmazonCompare and Save!
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Base: Wedge 360 degree White 2.8 Watts

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Base: Wedge 360 degree Natural White

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Kohree HP472-HM LEDAmazonCompare and Save!
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Base: Wedge 180 degree Natural White

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Base: Wedge 360 degree Warm White

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GRV TL-1350 LEDAmazoneBay Compare and Save!
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Base: Wedge 180 degree Natural White

GRB 921-NaturalWhite-42LED-20PCS

GRB 921-NaturalWhite-42LED-20PCS LEDAmazonCompare and Save!
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Base: Wedge 360 degree Natural White

TCBunny KT-27

TCBunny KT-27 LEDAmazonCompare and Save!
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Base: Wedge 360 degree White

YINTATECH A10-W042-x10k

YINTATECH A10-W042-x10k LEDAmazonCompare and Save!
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Base: Wedge 360 degree Warm White

AMAZENAR T10_194_168_ 168-5050-5SMD

AMAZENAR T10_194_168_ 168-5050-5SMD LEDAmazonCompare and Save!
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Base: Wedge 360 degree Warm White

SRRB T10-2538-2_5W

SRRB T10-2538-2_5W LEDAmazoneBay Compare and Save!
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Base: Wedge 360 degree White

YM E-Bright T10-5050-5SMD

YM E-Bright T10-5050-5SMD LEDAmazonCompare and Save!
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Base: Wedge 360 degree White

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AucanLed AucanLed LEDAmazonCompare and Save!
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Base: Wedge 180 degree Warm White

GRB 20pT10HBY24L35-ww

GRB 20pT10HBY24L35-ww LEDAmazonCompare and Save!
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Base: Wedge 360 degree White

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Base: Wedge 180 degree Cool White

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Base: Wedge 360 degree White

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Comments

  1. Don Reynolds says

    August 26, 2011 at 10:40 pm

    Thanks. I didn’t know working with LED’s could be so easy. I’m going to order a couple of these things and try going Green. Thanks RV52.com!

  2. rv king says

    April 12, 2012 at 1:36 pm

    Look at home depot for the phillips accent LED for landscape they work great!

  3. Neil says

    June 22, 2017 at 9:21 am

    I would like to replace the rg921 with a bulb that is not as bright. These things are blinding!
    Any ideas?

  4. Marlan at Rv52 says

    June 22, 2017 at 9:48 pm

    Usually… people try to get their lights BRIGHTER not dimmer! So you are a bit contra-trend. If I use 280 lumens, a measure of light output, as my benchmark for brightness – then this LED light is only 220 lumens. So this is ONE way you can go – http://amzn.to/2tzNCL7 – there is only one review and it was a 5 star so you know that is bogus.

    Here is a highly rated light fixture with LED lights in it and each side has a switch. That may help since most RV light fixtures seem to have both sides turn on with a single switch – http://amzn.to/2t0FExy

    A BETTER strategy might be to find a dimmable RV LED light fixture – http://amzn.to/2t0wilE – this one seemed fairly highly rated. I wonder is it too darned hard to make a dimmer fixture!!! Probably not very popular I guess.

  5. Tom says

    April 4, 2021 at 3:09 am

    GRB 921 LED is excellent. The best thing about these 921 RV LED bulbs is that they serve as a direct 921 bulb LED replacement to the traditional incandescent bulbs that came with my rather old RV. Another feature that amazed me was the bulb’s low energy consumption.

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