I know this topic has been discussed extensively :-) 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

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.

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?

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

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.

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-T13ZB-/181285323429?pt=LH_DefaultDomain_0&hash=item2a357282a5Thanks!!

LED bulb replacement | Good Sam Community

westend
Explorer
May 21, 2014
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.
Craig_N_Tammy
Explorer
May 21, 2014
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?
WA7NDD
Explorer
May 21, 2014
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.
beemerphile1
Explorer
May 21, 2014
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.
Craig_N_Tammy
Explorer
May 21, 2014
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-T13ZB-/181285323429?pt=LH_DefaultDomain_0&hash=item2a357282a5

Thanks!!
pianotuna
Nomad III
May 21, 2014
Hi,

That fits with 1.4 amps for the c921 bulb about 144 lumens.
beemerphile1
Explorer
May 21, 2014
According to Grainger, a 921 lamp is 264 lumen initially.

http://www.grainger.com/product/GE-LIGHTING-Miniature-Lamp-3BB28?s_pp=false
tenbear
Explorer
May 22, 2014
Craig N Tammy wrote:
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-T13ZB-/181285323429?pt=LH_DefaultDomain_0&hash=item2a357282a5

Thanks!!

I think you would prefer an 18-5050 led lamp. To me, the 13-5050 would be quite a bit dimmer than the 921 lamp.
Craig_N_Tammy
Explorer
May 22, 2014
Thanks tenbear! I'll take a look at those.
ADK_Camper
Explorer
May 22, 2014
I just replaced all my OEM 921 lights with LEDs. The research I did came up with the figure 264 lumens per 921 light. I got all my LEDs from M4Products. Very quick delivery (2 days) and very good customer service. One LED was defective; they replaced it immediately with no hasstle.

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