921 LED replacements

Comptech · 03-11-2013, 07:00 AM

Replaced the 921 bulbs in the 5er with these: They look very good and were easy to install...

http://www.ebay.com/itm/10x-Warm-Whi...-/140844896142
http://www.ebay.com/itm/121034182163...84.m1439.l2649

hankaye · 03-11-2013, 08:10 AM

Comptech, Howdy;

With the top link, how many did you receive in a package ??

hankaye

**JRTJH** · 03-11-2013, 09:35 AM

Hankaye,

The top link indicates 10 LED assemblies for 10.09+ 1.99 shipping. That's 12.08 for 10 or 1.21 each. Keep in mind that they are listed at 100 lumens output.

The second link is 10 assemblies for 18.09+1.99 shipping. That's 20.08 for 10 or 2.01 each. They are listed at 240 lumens output.

It doesn't indicate which type LED is installed in the round type so there's no way to accurately determine if the lumen output is correct based on the number of LED's, but the square ones are listed at 20 of the 5050 SMD's on each board. To get 240 lumens from that assembly would mean 12 lumens from each LED. Usually 5050 LED's produce between 8 to 12 lumens, so the advertised output is at the optimistically high end.

The round ones probably are 3528 LED's which produce 4 lumens each. That would mathmatically add up to the correct lumen output as advertised. They are best for mood lighting or subdued lighting as they are not but about 40% as bright as the square assemblies listed in the post.

Actually, if you want the reality of things, the 5050 LED is really three of the 3528 LED's in the same chip. So they would be 3X brighter than the 3528 per LED component.

Comptech · 03-11-2013, 09:56 AM

Howdy,
All I know is the round ones that replaced the 921 bulbs look great and I could tell a difference but is was minimal... I think once they shine through the clear magnified covers they are very bright.. Sooo Also what I did with the one set that came with the flat panel LEDs was, the front lights on the 5er for hooking up the 5er are a larger 1156 bulb type, so I carefully broke the glass bulbs to save the fitting. Then I scraped out the glass and soldered on the LEDs to the old fitting. Worked like a charm..

Does anyone know how many lumens area the stock scare lights? I wonder if two of these would replace them?

http://www.ebay.com/itm/36-LED-PANEL...33169b&vxp=mtr

Festus2 · 03-11-2013, 10:10 AM

Moderator's Note:
The above 4 posts were moved out of the LED Sticky to start a new thread here.

Comptech · 03-11-2013, 10:12 AM

Festus,
If the subject matter is a sticky I guess you would prefer to have us start a new thread?

**JRTJH** · 03-11-2013, 10:16 AM

I bought an 1156 replacement LED bulb similar to this one in the 6500K range to install in my scare lights. http://www.ebay.com/itm/1x-BA15S-114...item27cf28c5dc They are "OK" but not any brighter than the original incandescent bulbs and don't seem to have quite the range or distance of illumination that the incandescent bulbs had.

I recently installed some high intensity floodlights on the back of my tractor and they really light up the neighborhood. Each of them has 9 very high intensity LED's encased in a plastic block. I'm currently looking for a "scare light" adaptation of this type floodlight. I know they're out there, I just havent found them. The ones I bought were $27 each and one of them lights up an area about 40' wide and 100' long. More than enough light for any RV "scare light" application. Just need to find them.......

Festus2 · 03-11-2013, 10:17 AM

Comptech

Yes, and that is why I moved these 4 posts here - to start a new thread or discussion.

Trying to keep the discussion part out of the sticky which is intended to be a tutorial only.

If you have any pertinent information to enhance the sticky, please send me a PM with the info you think should be included in the tutorial. Thanks.

SteveC7010 · 03-11-2013, 12:07 PM

Both the 1156/1157 and 3156/3157 bulbs are rated at 402 lumens for the incandescent versions. I believe those numbers are required to meet SAE and DOT standards for turn signals which is the original design and use of these bulbs.

**JRTJH** · 03-11-2013, 03:34 PM

Steve, I think you're right about the lumen output of the 1156/3156 bulbs. As for the higher output filament in the 1157/3157, I'm not real sure and too lazy to look it up right now but the standard burning filament is the same as the 1156. LOL

Anyway, the replacement LED's that I got for my scare lights are rated at 6500K and 350 lumens. That's the bright white light frequency and 30 each 5050SMD LED's at 12lumens each is 360 lumens total output. Objectively, they may be in the "ballpark" but subjectively, they just aren't near as bright and don't throw a beam nearly as far as the incandescent bulbs. I'm barely "OK" with them and I'd say not satisfied with their performance overall.

I want to find the "guts" for those LED floodlights, those things perform better than the headlights on my truck, have an output of about 2500 lumens, yet they draw only 25 watts at full power. That's still less than half what a standard 1156 halogen bulb draws.

SteveC7010 · 03-11-2013, 04:04 PM

Quote:

Originally Posted by JRTJH

Steve, I think you're right about the lumen output of the 1156/3156 bulbs. As for the higher output filament in the 1157/3157, I'm not real sure and too lazy to look it up right now but the standard burning filament is the same as the 1156. LOL

I have the spec sheets here on all of them. 402 lumens is standard for the 1156/3156 (and others) and for the high side of the 1157/3157's. As I said, it's the SAE and DOT standard for stop and turn signals.

Quote:

Originally Posted by JRTJH

Anyway, the replacement LED's that I got for my scare lights are rated at 6500K and 350 lumens. That's the bright white light frequency and 30 each 5050SMD LED's at 12lumens each is 360 lumens total output. Objectively, they may be in the "ballpark" but subjectively, they just aren't near as bright and don't throw a beam nearly as far as the incandescent bulbs. I'm barely "OK" with them and I'd say not satisfied with their performance overall.

I want to find the "guts" for those LED floodlights, those things perform better than the headlights on my truck, have an output of about 2500 lumens, yet they draw only 25 watts at full power. That's still less than half what a standard 1156 halogen bulb draws.

I have been there and have a drawer full of inadequate LED's to prove it. Getting my Cougar converted over to all satisfactory LED lighting is a project that started 5 or 6 years ago when we still had the Sunline.

Side note here: My truck has a pair of 921 incandescent's for the back up lights. Horribly inadequate by any standard with just 264 lumens out of each bulb. I just received the lights that I am going to install in place of them. They are rated at somewhere between 2,400 and 3,200 lumens each. I think they'll do the trick.

canusa · 03-11-2013, 05:18 PM

Any chance I can see a pic?

Sent from my iPad using Tapatalk HD

**JRTJH** · 03-12-2013, 06:19 AM

Quote:

Originally Posted by SteveC7010

...Side note here: My truck has a pair of 921 incandescent's for the back up lights. Horribly inadequate by any standard with just 264 lumens out of each bulb. I just received the lights that I am going to install in place of them. They are rated at somewhere between 2,400 and 3,200 lumens each. I think they'll do the trick.

The lights you're installing sound about the same light output as the ones I installed on my tractor. They are a great way to light up the area behind you. I installed two on the back of my tractor (to light up the 3 pt hitch area) and it's like daylight for "half a football field" behind me. I'm looking for the "guts to those lights" in a bulb form to install in my scare lights. With no heat and about the same power requirement as a single 1156 bulb, I think they will be a significant improvement over the current incandescent and LED bulbs available for the scare lights.

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