Lotus Elan

The LED lighting thread

PostPost by: 1owner69Elan » Wed Nov 22, 2017 12:43 am

Were your incandescent (filament) lights that you were comparing against new or had they been used for awhile.

As the following link shows the incandescents quickly degrade and have a "designed" lumen output some 60% less than the initial output.

https://www.rvledbulbs.com/v/vspfiles/a ... tbulbs.pdf

The LED replacements for a 1157 (single) that I used would have had a lumens output(325) that would be a bit less than the initial incandescents(402 lumens) but would be twice the output once the incandescents had aged (161).

When I installed my LED tail/stop lights I was comparing against aged incandescents and the LED's were clearly much brighter.
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PostPost by: Sea Ranch » Wed Nov 22, 2017 8:40 am

At 4000K, this bulb is rated at 675 lm. Of course, the red version has a much lower lumen rating. But they say that's always the case. The perceived brightness of the red version will look as strong, and the colour won't wash out as it comes through a red tail lens, unlike a white bulb. (They also have a 420 lm 1157 led bulb)

https://www.superbrightleds.com/moreinf ... ifications
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PostPost by: fatboyoz » Wed Nov 22, 2017 12:15 pm

Hi,
I converted my front indicators to combination driving lights/indicators. To do this I had to fit a double contact base ( to take a 1157 bulb) purchased from Holden Vintage and Classic in the UK.
I then fitted a set of these to the Amber lens. I had to cut them to fit, and use silastic to hold them in place.
https://www.customdynamics.com/led-fron ... 59?cat=622
These flat plate LEDs (48 LEDs per plate) are on at full brilliance when ever the ignition is on. When an indicator is selected, the light blinks on and off at full brilliance. The LED plate has an imbedded chip that senses the incoming indicator signal, and turns the LEDs off. This, I think, would satisfy what you are trying to achieve. The only odd thing, is that the when the front blinker is on, the rear blinker is off.
I have had this system fitted, along with all the other LED lights for the last six years or so.
Cheers,
Colin.


1owner69Elan wrote:Here's a positive earth flasher that appears to be suitable:

https://www.ebay.co.uk/itm/12V-ELECTRON ... 1922801187

As I mentioned my car did not come with sidelights, just a blank spot on the body. Putting an LED as a daylight running light (DRL) seems to be a reasonable addition in my case. There is no legal issue per se, so long as I shut the DRL off while signaling, as I intend to do.

Regarding the visibility of indicators, I found the following:

1. On the back lights (again Federal S4) the amber indicator lights are off until lit for a turn signal. Thus, there is a very clear demarcation on/off. Also, the red upper part is separated by a metal baffle so there is no scatter.

2. On the front indicators, a different situation. The dual circuit amber (BA 15D) incandescent gives a pretty clear demarcation between on/flashed. But the LED is more subtle, wherein the flashed indicator is only slightly brighter at least to the eye. Interestingly, the red rear lights that are also dual circuit seem fine. When the brakes are applied the difference in intensity is quite clear. But of course the brake lights are not flashed.
In fact, I am not that happy with the LED's compared to the incandescent for the front indicators even though they are brighter in static mode. When flashing indicating a turn, they definitely are not as distinct. As a result, I may likely go back to the incandescents for the front indicators. Fortunately, the flasher relays work for both types of bulb.
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PostPost by: nomad » Wed Nov 22, 2017 3:54 pm

Meg confirms my experience......nothing gained over the incandescent's. I am sure, however, there are better LED's available now.

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PostPost by: Sea Ranch » Wed Nov 22, 2017 6:38 pm

Colin, so you've been driving without rear signals for six years?
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PostPost by: MarkDa » Wed Nov 22, 2017 7:29 pm

Or do they alternate? When front is alight rear is dark and vice versa.
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PostPost by: fatboyoz » Wed Nov 22, 2017 8:59 pm

Hi Searanch and Marc,
The blinkers alternate. When the front is lit, the rear is off and V.V. I have the same system on my Harley, which is where the idea came from.
I have successfully used LEDs throughout the car for many years. In my case, the LEDs are much better than the incandescents previously fitted.
I purchased most of the LEDs from Superbrightleds. The quality is good.
Cheers,
Colin.





MarkDa wrote:Or do they alternate? When front is alight rear is dark and vice versa.
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PostPost by: Quart Meg Miles » Fri Nov 24, 2017 5:48 pm

The alternating flashers have a bonus in keeping the current almost constant, probably more vital on a bike than a car.

Regrettably, my bulbs, now I look, are pretty sooty but I have seen one of the problems with the LEDs: they sit half inside the socket which masks the light:

lamp-sunken-led-160_5733.jpg and

So I designed a little reflecting cone to drop inside the housing and push the light out and it works! Its radii are 28 mm and 15 mm and I cut it from a beer can! Fortunately the can was empty but it is a coincidence that the flat shape is a semi-circle:

lamps-the-cone-160_5735.jpg and
lamps-fitted-cone-160_5736.jpg and
lamps-tail-bulb-l-led-cone-r-160_5743.jpg and
Standard bulb on left, LED with cone on right.

I don't know the lamps of other models to advise whether they have the same problem but you can inspect your own.
Meg

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PostPost by: lotocone » Tue Jul 10, 2018 7:20 pm

I am just starting to study LED lights for my S4. This video from Moss Motors is 5 years old, so maybe it's getting outdated, but it helped me understand about the need for updated flashers and other things. I think the speaker is a good teacher.

https://www.youtube.com/watch?v=auLY6IYeqcI
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PostPost by: Chancer » Tue Jul 10, 2018 7:52 pm

Excellent presentation, the first ever Youtube video that I have not had to skip the first quarter/half or just switch off because the speaker is so boring, repetitive or drowned out by unwanted music.
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PostPost by: The Veg » Sat Sep 08, 2018 9:38 pm

elanfan1 wrote:Please add your knowledge of bulb holder sizes ( requote or copy/paste your additions and old posts can be deleted)

Dashboard/Instrument lamps - BA9


The ones in my Plus 2 appear to be an E10 base.
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