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LED bulb replacement

Craig_N_Tammy
Explorer
Explorer
I know this topic has been discussed extensively ๐Ÿ™‚ however I'm trying to solve an additional problem at the same time we change out our bulbs to LEDs. I can't find anywhere how to determine how many lumens my current incandescent bulbs are? The only markings on my current bulbs are C921. I've read dozens of posts here about which ones to use (think I've settled on getting them off ebay from 2011_led). Now I just need to determine which ones (e.g. how bright). What I want to do is not only swap everything over to LED, but make some of them a little dimmer.

Any ideas how to determine this, outside of just buying several different LEDs and trying them out?

TIA,
- Craig N Tammy
21 REPLIES 21

beemerphile1
Explorer
Explorer
According to Grainger, a 921 lamp is 264 lumen initially.

http://www.grainger.com/product/GE-LIGHTING-Miniature-Lamp-3BB28?s_pp=false
Build a life you don't need a vacation from.

2016 Silverado 3500HD DRW D/A 4x4
2018 Keystone Cougar 26RBS
2006 Weekend Warrior FK1900

pianotuna
Nomad III
Nomad III
Hi,

That fits with 1.4 amps for the c921 bulb about 144 lumens.
Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Craig_N_Tammy
Explorer
Explorer
Thanks! ok the search shows that a "standard" 921 is 144 lumens. So I wasn't too far off in selecting these: http://www.ebay.com/itm/1x-T10-194-921-bulb-AC-DC12-24V-13-5050-SMD-LED-Super-Bright-Warm-White-T13Z...

Thanks!!

beemerphile1
Explorer
Explorer
If memory serves a 921 is around 250 lumen. Just Google "921 lumen".

I replaced my 921 lamps with LED panels from Command LED. I got 510 lumen to replace the 250 lumen incandescent lamps.
Build a life you don't need a vacation from.

2016 Silverado 3500HD DRW D/A 4x4
2018 Keystone Cougar 26RBS
2006 Weekend Warrior FK1900

WA7NDD
Explorer
Explorer
The Brightest Ba15s LED Light Bulb Replacement - Cool White Color - 2nd Generation with 66 LED's - Single Contact Base - 10-30V DC

These are what I installed in our MH, bought them on Amazon. I am interested in bright light, not dim light. Price is $11 each, I replaced eleven blubs, a bit spendy, but worth it. I saw that you were interested in some dim light also. If the blub base fits you wont find them much brighter, if you need them.
1998 Four Winds 5000 Rigby, ID

Craig_N_Tammy
Explorer
Explorer
Thanks westend! Do you have any idea which bulb in a cob style would be equivalent? Would a 48 LED cob style also be equivalent do you think?

westend
Explorer
Explorer
48-3528 panels in warm white will be very close to your existing incandescents. 36-3528 will be only slightly dimmer. 2011-LED is a good seller.
'03 F-250 4x4 CC
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