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 > Cargo light replacement bulb

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pinesman

virginia

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Posted: 01/18/20 07:05am Link  |  Quote  |  Print  |  Notify Moderator

I have a 2007 GMC 3500 and I would like to replace the cargo light bulb with a brighter LED bulb.I would like to be able to get enough light to easily see the level on my pin box. Has anyone used a bulb that is a lot brighter than stock they recommend for this?

Sam Spade

North Central Florida

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Posted: 01/18/20 07:24am Link  |  Quote  |  Print  |  Notify Moderator

A bulb that is a LOT brighter might not be the best solution......IF it is positioned so that it shines in your eyes.
A little shield of some kind might be more effective, or both together.


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travelnutz

West Michigan - On the Lakeshore

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Posted: 01/18/20 08:15am Link  |  Quote  |  Print  |  Notify Moderator

Likely you'd have to go to an LED (if you can find one to derectly replace with higher lumens output} VS the incandescent OEM bulb. A brighter Incandescent bulb would put out more to a lot more heat than the OEM original.

For instance: An OEM 1156 incandescent bulb will draw 30+ amps of 12V DC and get very hot, way too hot to touch, while an LED with the same lumen output will only draw about 5 amps and is only warm to the touch. The excessive heat produced inside by a higher lumen output bulb in the enclosure is your eenemy! Heat produces no lumens (lost energy consumption), but sure can produce a fire or the melting of the plastic enclosure. Not good!

The cargo light bulb like most other vehicle bulbs are usually trapped inside a small enclosure and a higher heat output could mean a fire or at a min a very short use life before bulb failure. Burn out so much quicker. Especially in hotter climates or in a hot summer elsewhere. Lumens is the measure of light output.

LED's even at double or triple the lumen output are so much cooler operating when on. Just a fraction of the heat produced by a same lumen output incandescent bulb and also last 10+ times as long before failure.

If you are handy and able, it's possible to install a different socket inside the cargo light enclosure so a 12V required LED with a much higher lumen output could be used. I had done this myself in2 of our 5th wheel basements and more than doubled the lumens.


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enblethen

Moses Lake, WA

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Posted: 01/18/20 08:18am Link  |  Quote  |  Print  |  Notify Moderator

Auto parts list two lamps a 912 and 921.
A 921 LED lamp with the highest Kevlin level some where around 6000 will give you more light then incandescent.

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* This post was edited 01/18/20 08:34am by enblethen *


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travelnutz

West Michigan - On the Lakeshore

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Posted: 01/18/20 08:32am Link  |  Quote  |  Print  |  Notify Moderator

They do make some roughly 2.5" X about 6" interior overhead ceiling replacement light enclosures that seem to be sealed and possibly counld replace your cargo light fixture. I doubt if they would be UV protected plastic though. They are very bright and run very cool. Lots of LED's in them and draw so little amps. Could even use 2 or more of them mounted on nice looking light type bar using the OEM wiring.

Of note: Not to be used when not towing a light blocking trailer behind as there are laws prohibiting the use of bright white lights on the rear of vehicles. The driver behind's vision is dangerously compromised.

travelnutz

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Posted: 01/18/20 08:51am Link  |  Quote  |  Print  |  Notify Moderator

Kelvin to the light temperature of the light rays not the lumens of light output. 6000 kelvin is a blueish white appearing light and yes it appears somewhat very white but a single 921 LED has a quite low lumen level output. I have two LED 921'a in our range hood and it's just enough light to see clearly what's cooking 18" below. Perhaps a gang of 921's would broadcast enough light to actually see the black 5th wheel hitch 4 feet behind by using a shiny cone shaped reflector. Gobs of possibilities can be experimented with. Who knows, might come up with a real novel idea or even a patentable idea. Yankee ingenuity at work...

travelnutz

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Posted: 01/18/20 08:52am Link  |  Quote  |  Print  |  Notify Moderator

The OP is looking for ideas!

opnspaces

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Posted: 01/18/20 10:13am Link  |  Quote  |  Print  |  Notify Moderator

Definitely go with an LED bulb. You'll probably have to look at the old bulb to see if it is in fact a 921 bulb or something different.

As far as the K value I personally don't like the color of 6000K LED's I find them to be way too glaringly white. So I always find LED's in the 3000K range as they more closely mimic an old school incandescent light.


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blt2ski

Kirkland, Wa

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Posted: 01/18/20 10:28am Link  |  Quote  |  Print  |  Notify Moderator

Look at RV and marine supply places for LED equals too.
Only issue I see, is will the light reach the level in such a way you can see it. A good old fashioned light bulb may still be best......
Dr LED us a brand with many bulb options.

Marty


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Grit dog

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Posted: 01/18/20 12:19pm Link  |  Quote  |  Print  |  Notify Moderator

Have you actually gone to an auto parts store and looked at bulbs? (Or online if you're the couch bound type).
There are LED replacements right there on the rack for virtually every bulb. And for like $5.99 + tax you can try one out vs pontificating.


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