Sunday, February 24, 2019

OK OK - Maybe I have an LED addiction?

So in my last LED post for 2018, I mentioned that I had been tempted to replace the rear turn signal bulbs with LED ones as well.  But, I was too lazy to figure out how to wire in the resistors - but a couple of you quickly educated me on replacing the OEM turn signal relay with one that works for LEDs.

I may just have to go that route in the end, but for now, I was able to find some orange LEDs that not only claimed to be super bright, but had the required resistors already built in! I am too lazy to figure it out, but one question I had on the relays was, would using such relay require me to change out ALL bulbs in the turn signal circuit (so all of the orange ones - front, side and rear) or would the relay be able to handle a mix?

So for now, since I wanted to experiment and see how much brighter LEDs were for the turn signals, I went ahead and ordered these:
Pricing wasn't that bad - around 3400 yen for the pair.

Here are the specs, for those interested

Saying it has good heat dispersion and is high quality. We shall see...

Flash forward a few days and I got this in the mail:

With apologies to my Chinese friends, yes, it appears Chinese quality cheap... But hey since most  smart phones and electronics are now made in China, I'm not going to just on packaging... for now. After all, performance is everything in the end.

So here is how my car looks with regular bulbs:


And then the difference between the LED on the left and the regular bulb on the right (check out how the incandescent bulb on the left turns on slightly before the LED bulb does).

And finally with these LEDs on both sides:


So what do you all think? Frankly, while I like the brightness, here is what bothers me - the light isn't as evenly diffused across the lamp housing. It's more pinpoint really. Also, yes it is very bright - I wonder if it's too bright?  Finally, while I was handling the bulbs and switching between the LEDs and the regular bulbs (to take these videos - I neglected to take the one with regular bulbs until AFTER I put one LED bulb in), I realized these LEDs run VERY HOT!  Is this normal?

In any case - I think more research is needed here. Maybe a cool upgrade would be an LED strip that lights up directionally, like the newer cars? Keep the outside housing the same but just replace in the inside with such a strip... that might work?

But I'll keep these for now!

5 comments:

Anonymous said...

The LEDs run very hot because the built-in resistors that keep the flashing at the same speed are going to dissipate the energy as heat.

It looks like the "smart relay" replacements will work whether you use incandescent or LED: https://www.theretrofitsource.com/original-tapturn-strobe-led-flasher-relay.html

Anonymous said...

Regarding "Chinese quality" - I think most people that are not blind to their flaws will admit that mainland China especially has a "chabuduo" attitude towards quality. It is an admirable trait for getting through hard times but to keep growing as a society it is important to care about attention to detail. The safety record for many things in China is not good and I think people in Hong Kong and Taiwan are quite aware of these things...

I suspect that if you find the right bulbs you will be able to get good light diffusion throughout the housing. Reflectors for turn signals are designed to reflect in all directions so that the turn signal is visible. This will probably be harder than it seems though, I hope you will be able to find a good LED bulb for the turn signals.

Anonymous said...

I understand why you're doing it but most LED bulbs won't give you the result you want or are expecting because they were not properly designed to work with reflectors to start with. They will give you the brightness - and those look way too bright IMO - but quite often fail at giving you a uniform spread or even giving out more usable light.

If you really want to update the look of them you're better off buying another pair of taillights and having someone do a custom job with SMDs on a circuit board, COB, Rings, etc, which would also allow for some creativity and customization. Example, having the indicator/reverse/fog as one bigger indicator with separate LEDs for reverse AND fog on both sides.


Jbburns said...

I know this might go against your stock look style philosophy, but aside from cost, why not go with zleds?

https://zledslights.com/tag/gtr-r33/

Anonymous said...

As the other anon has said most LED bulbs won't give the desired result but it is 100% possible to create an LED bulb that has the proper light pattern. Midori Seibi has managed to figure out how to retrofit LEDs to the R32 headlights with proper cut-off and improved light output, you just have to have some actual optical engineering in the design instead of blinding sticking SMD LEDs in a random pattern and expecting great results.