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Old 01-28-2013, 03:40 PM   #1
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Replaced 921 bulb with cheap LED

A couple of weeks ago I took a chance and ordered four cheap LED replacements off E-Bay for my little trailer. The set me back a whopping $3.99 each. I figured that if worst came to worse, I'd only be out $12 vs. $100 or so from CampersWorld.

Saturday I installed them. First one wouldn't turn on. Then I unplugged it and turned the plug over and Ta Da!!! Let there is light! It was just a bright as the 921 it replaced. Just slightly bluer than the existing, but I can handle that. So, I did three more bulbs. I am impressed.

So impressed that it revisited E-Bay and found the same bulb in a 10 pack for $36.99. They are on order. Should be here in a couple of weeks from China. The only fixture that I am not replacing is the one inthe bath room. Miss N would like to have the warmer incadescent for working in front of the mirror. Fine, all the rest oft he ceiling lamps will be LEDs.

Now I need to find a replacement for the little spotlights beside the bed. May have to replace one fo the porch lights too. Battery drain is going to drop like a brick.

Here is a link to the bulb I got:

1pcs BA9S 921 Festoon 31 44mm Dome Bulb Warm White 36 1210SMD LED Super Bright | eBay
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Old 01-28-2013, 08:27 PM   #2
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I had the same problem with a LED light that would not work until I flipped it over. You'd think that there would be a label with the bulb that told this.
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Old 01-28-2013, 08:46 PM   #3
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I ordered the cheap ones too. Have had mine in for a couple of months now and they are working fine. The real question remains, for how long???

I figured, at worst case scenario, they will produce less heat than the halogen bulbs. I bought the 10 pack for 30 bucks.

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Old 01-30-2013, 04:35 AM   #4
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I use warm white bulbs. The spot bulbs will run you about $20 just do a search.
2 bulbs fail on us and they were a trial order from US supplier.
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Old 01-30-2013, 10:58 AM   #5
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I use warm white bulbs. The spot bulbs will run you about $20 just do a search.
2 bulbs fail on us and they were a trial order from US supplier.
I did get the warm whites. They are just slightly bluer than the incandescent, closer to fluorescent. But, not the LED blue that I was afraid of. Searching for the spots as we talk. These will go on the headboard.
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Old 01-30-2013, 03:35 PM   #6
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LED = Light Emitting Diode.

A diode for those of you who are not into electronics is like a check valve on an water line.

Current only flows one way

SOME LED assemblies have devices that will take care of "plugged in the wrong way" some do not.
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Old 01-30-2013, 09:44 PM   #7
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Can those LED lights be patched directly into the 12v wiring in the trailer?
Bruce
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Old 01-30-2013, 11:13 PM   #8
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Can those LED lights be patched directly into the 12v wiring in the trailer?
Bruce
Need to use proper base socket and wire it in.
They need to be mounted proper way in socket. If not lighting rotate 180deg..
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Old 01-31-2013, 01:47 PM   #9
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Can those LED lights be patched directly into the 12v wiring in the trailer?
Bruce
I agree with casie. Use a board with the proper socket. At $3.99 a "bulb" it's cheap insurance.
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Old 01-31-2013, 02:15 PM   #10
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I replaced my 921 bulbs with this one. I preferred the warm white vs the bright white. Also, extremely quick delivery from this seller.

1pcs T10 921 194 SMD Bulb 25 1210 LED Bulbs Lights Warm White | eBay




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Old 01-31-2013, 02:20 PM   #11
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I replaced my 921 bulbs with this one. I preferred the warm white vs the bright white. Also, extremely quick delivery from this seller.

1pcs T10 921 194 SMD Bulb 25 1210 LED Bulbs Lights Warm White | eBay
How does it compare in output? I tried something similar on my motorcycle brake/tail lights. It was a miserable failure. Just not bright enough to be seen.
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Old 02-12-2013, 07:30 AM   #12
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I replaced my 921 bulbs with this one. I preferred the warm white vs the bright white. Also, extremely quick delivery from this seller.

1pcs T10 921 194 SMD Bulb 25 1210 LED Bulbs Lights Warm White | eBay
The 1210 have about 3 times less light then the 5050. Therefore 25 1210 are similar to 8 5050. So I try to get the 13 5050 or more. For 1141 base up to 25 5050 seam to work. And 102 1210 are realy bright for the brighter lights for security lights. Enjoy.
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Old 02-12-2013, 07:43 AM   #13
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The 1210 have about 3 times less light then the 5050. Therefore 25 1210 are similar to 8 5050. So I try to get the 13 5050 or more. For 1141 base up to 25 5050 seam to work. And 102 1210 are realy bright for the brighter lights for security lights. Enjoy.
So, to put it in english, if I buy a 25-1210 LED to replace my original standard bulb, will it be brighter or dimmer?
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Old 02-12-2013, 07:59 AM   #14
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Quote:
The 1210 have about 3 times less light then the 5050. Therefore 25 1210 are similar to 8 5050. So I try to get the 13 5050 or more. For 1141 base up to 25 5050 seam to work. And 102 1210 are realy bright for the brighter lights for security lights
I see in post #10 the picture of the LED replacement using the 1210 LED bulb to replace the standard 921 rv bulb. But I don't understand the rest of the above quoted statement....

I'm going to assume my 2013 RV trailer has the 921's.....for all the overhead lights. In our old tt (2005) those bulbs sure burned hot....I was thinking about replacing the 921's in my new tt to #1). help keep the interior cooler and #2). save battery power. We have a stay in June that has us on battery power for 4 days. Last summer during a 5 day non-electric campground stay (Smoky Mtn.) the battery only lasted 3-1/2 days...
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