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albertj
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PostSubject: LED lighting   Wed Aug 24, 2016 12:58 am

LED lighting for our '95-'99 Rivs may be of interest to some.  I've been tinkering with it, thought I'd post a couple observations.

The replacements for incandescent are getting better.

There are some things about the way the Riv is wired that defy using them.

Any interest in more?
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jbird
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 3:59 pm

I have them in my license plate light and my backup lights.
I like the look on the plate nice modern hue.
The backups are crazy bright really like them. I have read others comments that the interior lights flash because of the " fade out ".

So, What have you found?

Jbird
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stydel311
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 5:04 pm

If you put led 9005 high beam bulbs in how does that work with the drl's?
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albertj
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 5:45 pm

jbird wrote:
I have them in my license plate light and my backup lights.
I like the look on the plate nice modern hue.
The backups are crazy bright really like them. I have read others comments that the interior lights flash because of the " fade out ".

So, What have you found?

Jbird

I found, so far, there are issues but not so much that you'd rule LEDs out.

Regarding the interior lights, not all the LEDs do the flash thing; I got some 194 replacements that do not flash at fadeout, however they do not work properly in all locations. In the dome/map light for instance the 168/194-replacement LEDs that are polarized can be installed so they work with the doors or work with the switches -- not both. I imagine the ones that are not polarized might be the ones that flash. Have not tried those, really.

I put a set of the white polarized 168/194's in as taillights (the center of each side of the tail lights. They look and work fine. I have not tried any LEDs in the turn/brake positions yet, or any other places.

I suspect they will work fine as backup lights, and also in the (white) cornering lights.

I am thinking of putting LEDs in the inboard side of the turn/stop lights and also in the CHMSL. I put one in for license plate light and it is OK; however my reflector is compromised. It would work better with a good reflector. I have not decided what to do about that.

I had already wired some Oznium LED units (they are encapsulated) in the trunk to supplement the light in the trunk lid. I put them just under the trailing edge of the package shelf, and they light up the forward portion of the trunk very well. I used an LED replacement for the regular trunk light (a 12-chip 211) so the lighting colors would match. I am VERY happy with the results, you can see everything in the trunk now, day or night.

I have some ideas how to fix the interior lighting, basically wiring a couple bridge rectifiers onto the lighting fixture so that the LED lights will come on no matter the current direction. They are cheap ($0.50 or less each). LEDs do not draw much at all so these (http://www.ebay.com/itm/10pcs-KBP307-Bridge-Rectifier-Flat-Bridge-KBP307-3A-700V-/201322794464?hash=item2edfc60de0:g:b3cAAOSwstxVDQbE) would work fine. You could wire one up on the back of each fixture that has to take voltage 2 ways; you'd have to figure out which fixtures those are. Alternatively you could make your own rectifiers out of IN4002s or better, you're talking about $2 or less for all the diodes you'd need (not incl shipping) but a lot of people can get those surplus even cheaper than eBay rectifiers.

On the exterior the problem lights would be, for instance, getting the turn signals to flash correctly while the headlights are on (polarity issue) and the fact that the LEDs still have to get rid of heat if they are constant on--they will self destruct if they get too hot, or wet.
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albertj
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 5:53 pm

stydel311 wrote:
If you put led 9005 high beam bulbs in how does that work with the drl's?

Your issue will be that the DRLs work by shunting a resistor in series with the headlights. That decreases their brightness. That approach wont work with the LEDs, because the forward voltage cutoff is so sharp. To dim LEDs right, you probably should wire in a "chopper" to send DC pulses to the lights. By changing the duty cycle you change the perception of brightness of the lights. The fewer pulses per second, the dimmer they will look. By the way, that's how the interior "theatre lighting" dimmer works. The lighting module sends shorter and shorter pulses of DC to the lights. That last flash of the LEDs is the last pulse that it sends for that final glow. Some replacement 12v LED "bulbs" have circuitry that buffers such pulses and most do not. Not sure how to tell without ordering and testing -- which is vexing.

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albertj
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 6:11 pm

I am thinking one reason to use LED lighting would be to add functional lights, such as to illuminate the cupholders and the front/rear passenger footwells in parallel with the instrument lights. superbrightleds.com has LEDs that are warm white (like theincandescents) instead of bright white (like daylight) that might look better for some colors of interior. For instance, the Toreador Red looks like a maroon/purple under LEDs.
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jbird
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 7:25 pm

Albert
Looks like you've really been digging into it.
I have also wanted to supplement my trunk lightning, that is good to move some light forward.

However I haven't wanted to try LEDs in the taillight I really think our reflector/lens looks almost jewel like lit up.
I don't want to mess with it. I did make the middle light a brake and turn tho, it just looks right to have all three do the same functions IMO.
I'd like to see What you come up with for lighting the cupholder, I have thought that would be a good thing to do myself.

Jbird
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albertj
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PostSubject: Re: LED lighting   Wed Aug 24, 2016 10:56 pm

jbird wrote:
Albert
Looks like you've really been digging into it.
I have also wanted to supplement my trunk lightning, that is good to move some light forward.

However I haven't wanted to try LEDs in the taillight I really think our reflector/lens looks almost jewel like lit up.
I don't want to mess with it. I did make the middle light a brake and turn tho, it just looks right to have all three do the same functions IMO.
I'd like to see What you come up with for lighting the cupholder, I have thought that would be a good thing to do myself.

Jbird

About the cupholder: there is a 12v LED with wire leads, green, that pretty much directly replaces the lights that go inside the door pulls. It is intended for panel installation. I bought 4 of them from DigiKey. I have installed one in the power point on the passenger side of the center console so that it's lit at night. Gives a nice glow. . You can find the power point easily but it does not look like there is a party going on in there. I am thinking of using 1 or 2 of those lights in the cupholder. At the back edge (near the console) there is kind of a cutout. I am thinking the lights go there... problem is I have to pull the console to get them in and wired, to drill the small holes they actually would install into.

About the taillights: depends on how you do it. I find that the white LEDs are OK even mixed with regular bulbs but the red LEDs look better, actually, than either the white LEDs or the standard incandescents. Except the Sylvanias. Electrically the Sylvania DOT spec LEDs are probably the best, but they are side-firing lights. So they cast a cat's-eye shadow in the center of the lens on the part of the taillight assembly they are installed in. It is not a sharp shadow, some people won't notice it. As for me, I will move those lights to my other car (it has reflector in middle of the lens so the shadow won't matter) and try a different LED for the Riv, one of the high brightness ones with combined side firing and rear firing chips... I also think I will get red LEDs to replace the white 194-replacements I put in for the tail lights.
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