LED Tail Light Replacement Bulb - Page 3 - Alfa Romeo Bulletin Board & Forums
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post #31 of 81 (permalink) Old 12-13-2016, 07:36 AM
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I installed the red 650 lumens parking/brake LEDs as described earlier in this thread. While they are brighter than the regular bulbs (LED on the right), it's wasn't a huge difference for me. My incandescent bulbs were new as of a few months ago and I had cleaned the grounds and cleaned up the reflectors so I'm not necessarily surprised.



What did make a difference was the turn signal LEDs. I have amber turn signal lenses so I used the LUYED 2590 lumens LEDs (no external resistor required). I was too lazy to stitch the videos together but if you start them both at the same time you'll get a pretty good comparison.



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post #32 of 81 (permalink) Old 12-13-2016, 07:39 AM
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Quote:
Originally Posted by ossodiseppia View Post
I tried some on my roundtail and found them to be quite dim.
There are lots of different LEDs out there. You need to buy a high-quality one with a good light pattern for your setup. You also need to match the LED color to the lens color.

I put some LED 1157s brake lights in the Giulia and it was a world of difference. The main reason was to help prevent the brake light switch from burning out, but it helped a lot with visibility as well.

The bulb I used projects mostly forward with a 130 degree beam angle, but this did a good job of lighting up the Giulia reflector. For different applications a different LED pattern may work better or worse.

https://www.superbrightleds.com/more...rofit-car/808/

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post #33 of 81 (permalink) Old 12-13-2016, 12:28 PM
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180 degrees. And LEDs *should* run cooler, except when they contain a resistor to activate a flasher relay. It would be better to buy ones without the resistor, and just get the electronic flasher relay. Or put your own resistor in-line, just away from the plastic lamp housing.
Definitely get an electronic flasher.

And LEDs run cooler. My FLIR infrared camera confirms what my hand first told me, LED generate little heat.

I also suggest using a LED bulbs for the interior lights. I have GTVs and using the LED festoon bulbs have eliminated the problem of the translucent plastic lens covers on the interior lights being melted by heat put out by an incandescent bulb.

For at least the last 10 years I've been buying LED bulbs and accessories online from Superbrightled, Their products, along with technical assistance and their customer service are first rate.

Bob
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post #34 of 81 (permalink) Old 12-13-2016, 01:29 PM
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Quote:
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The bulb I used projects mostly forward with a 130 degree beam angle, but this did a good job of lighting up the Giulia reflector. For different applications a different LED pattern may work better or worse.

https://www.superbrightleds.com/more...rofit-car/808/
That is who I have used for all my LED lighting projects. My bulbs are only 110 degree, but work great.

Richard
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post #35 of 81 (permalink) Old 12-25-2016, 09:29 AM
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Originally Posted by ossodiseppia View Post
I would like to see some pictures taken at night. Would that be possible?

I tried some on my roundtail and found them to be quite dim.
Attached is a night picture of my S2 with new red LED tail / brake bulbs.

Sorry, I do not have any before pictures with standard incandescent bulbs. Suggestion for the next person doing this swap it would be nice to see night pictures of incandescent bulbs both before and after cleaning ground connections.
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post #36 of 81 (permalink) Old 12-25-2016, 10:02 AM
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Hard to judge from a picture but do you not consider that there is a point where they may be TOO bright? Because if they are approaching the level of brake or rear fogs then they really can be an irritation to the person following you. I know LED technology has given us super bright lights but in some cases like police and other emergency vehicles it has been taken to such an extreme that you can't actually look at them and they even wash out the hazard by blinding the driver. I know the idea is to be seen but my gosh yes, I see you already, enough!

With modern cars there seem to be two unintended mistakes by drivers. Either they are driving with front and rear fog lights lit on a perfectly clear night or they are driving with just their DRL's on completely unaware that they have no tail lights because their instruments are LED and are lit up all the time.
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post #37 of 81 (permalink) Old 12-25-2016, 10:22 AM
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Hard to judge from a picture but do you not consider that there is a point where they may be TOO bright?
That corona around the lenses is not visible to the human eye -- it's an artifact of my Samsung S7 camera's digital processing.

When I get back to CA in early January I can see if there are night photography settings on the phone or try my digital camera.

I do not think that they are too bright, and FWIW I am sensitive to oncoming, too bright headlights.

In retrospect it would have been better to have had the Forester's tail lights on for comparison in the photo.

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post #38 of 81 (permalink) Old 12-25-2016, 11:13 AM
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The 1157s I linked to, while brighter than stock in the Giulia, are not excessively bright. They're pretty equivalent to what you see on a modern car.

Tom

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post #39 of 81 (permalink) Old 01-15-2017, 09:15 PM
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In town, not sick, no rain, so I got pictures tonight of new LED taillight bulbs. Turned on the 2014 Forester's lights for comparison. Although I do not have before pictures with original incandescent bulbs, pictures below show that these 650 lumen LEDs have reasonable brightness levels.
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post #40 of 81 (permalink) Old 01-15-2017, 10:23 PM
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Based on my happy experience replacing tail light incandescent bulbs with LEDs, I decided to also replace my rear turn signal and back up bulbs with LEDs as well.

Here's what I ordered from Amazon:

5 White LEDs for $12.99: AUTOUS90 5 x 650 Lumens 1156 1141 1003 3014 54-EX Chipsets Led Bulb Used For Back Up Reverse Lights,Brake Lights,Tail Lights,Rv light,Xenon White

5 Red LEDs for $12.99: AUTOUS90 5 x 650 Lumens Super Bright 1156 3014 54-EX Chipsets 1156 1141 1003 7506 LED Bulbs Used For Tail Lights,Brake Lights and Turn Signal Lights,Red

Bought, but did not use, 4 LED load resistors: Zone Tech 50W 6Ohm LED Load Resistors - 4-Pieces Premium Quality LED Load Resistors for LED Turn Signal Lights or LED License Plate Lights or DRL (Fix Hyper Flash, Warning Cancellor)

Based on reviewing many LED listings on Amazon I think that these AUTOUS90 ones with 54 SMDs (Surface Mount Device) are a newer generation and are thus, hopefully, better in some way than previous generation(s). It seems that older generation LEDs use fewer, larger SMDs. Their cost was also attractive.

I did not order amber LEDs for the front turn signals and running lights, because I am more concerned with being seen from behind. Also, amber LEDs were a fair bit more expensive than white and red LEDs back in December when I ordered these parts. My thinking at the time was that I would install the rear LEDs and eventually get around to replacing the front turn signals and running lights with LEDs.

However, now I think i will leave the front incandescent bulbs as-is. Why? After installing the new rear turn signal LEDs, the turn signals flashed at the normal rate. There was no rapid flashing. After thinking for a moment I realized that the front turn signal incandescent bulbs were providing sufficient resistance in the circuit, so extra resistors are not needed.

Moral of the story: If you only replace one of the two (front or rear) turn signal bulbs on a side of the car, you do not need an additional load resistor. (I did not do the circuit analysis, but welcome confirmation from anyone who does.)

Conjecture: I bought four load resistors under the assumption that one is needed per LED. However, if you replace all four turn signal bulbs with LEDs, I think you only need TWO load resistors. One for the pair of left turn signal LEDs and another for the pair of right turn signal LEDs.

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post #41 of 81 (permalink) Old 01-16-2017, 06:16 AM
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Quote:
The 1157s I linked to, while brighter than stock in the Giulia, are not excessively bright. They're pretty equivalent to what you see on a modern car.
I installed these bulbs on my Spider and they are a bit brighter than the stock bulbs. Thanks for the tip.

Ed Prytherch
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post #42 of 81 (permalink) Old 03-28-2017, 10:37 AM
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I installed the recommended bulbs on my roundtail a couple of weeks ago. I am extremely happy with the results.

Has anyone looked into LED headlamps bulbs?
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post #43 of 81 (permalink) Old 03-28-2017, 11:02 AM
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Nice, but looks like you got yellow bulbs? If they're behind the red lens you should have gotten red. LEDs are narrow-band light sources (they only put out a narrow range of wavelengths) so if you don't match the LED to the lens you don't get proper brightness out of the overall system.

Tom

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post #44 of 81 (permalink) Old 03-28-2017, 11:06 AM
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I went for LED running, turn,reverse and brake lights on my 1976 Spider. I really like the resulting 'fresher' look...

I used an electronic flasher (my old can flasher was about dead anyhow...), which caused me to switch to an LED for the indicator arrow.

A few notes - LED-based 'bulbs' get hotter even though they do draw far less current (hence needing the electronic flasher). This is because an incandescent bulb RADIATES (wastes) infrared light, basically heat, but that heat winds up far from the bulb in the end. An LED doesn't radiate infrared, but the power supply stage (which might just be a resistor!) generates some heat which doesn't go anywhere. It just heats the bulb base.

Some of the tiny dash lights are polarity-sensitive - if you try those, test as you go (they won't die if backwards - just not light).

Superbrightleds.com has good prices & descriptions.

A primary reason I went to LEDs was to avoid the need to take apart my running light assemblies to 'change a bulb' - the LEDs should last many times the lifespan of an incandescent bulb. That's why I did the dashboard lights and glovebox, mirror and trunk lights in LEDs as well (not quite as satisfied with that change - dimming works poorly, and some bulbs have poor radiation angles...).

My hope is to never again need to change a bulb!

------------------------------

LED headlights are not quite ready for prime-time, in my opinion. But I'll keep checking on their progress...

50 years from now - how are we going to restore a "classic" microprocessor based modern car?? Alfas - 1980 Spider, 1987 Milano, 1976 Spider
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post #45 of 81 (permalink) Old 03-28-2017, 05:21 PM
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Quote:
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Nice, but looks like you got yellow bulbs? If they're behind the red lens you should have gotten red. LEDs are narrow-band light sources (they only put out a narrow range of wavelengths) so if you don't match the LED to the lens you don't get proper brightness out of the overall system.

Yellow for the front and red for the rear.

You can really on cell phone pictures for color accuracy.

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