For years I wanted to convert my headlights from Halogen to LED. But for the longest time, there were only two real options. JW Speaker headlights which were very expensive, not much brighter then standard bulbs and not much power savings either. They've since come out with a second generation that's brighter but still expensive. There's also those units that have an array of LEDs, but they look funny. It wasn't until last year when I found out about LED bulb replacements designed to directly replace halogen bulbs that I decided to finally go forward with a conversion. So here's what I did and my though process. I also addressed a few other issues I had with my headlights at the time.
I first ordered a set of LED bulbs for my MINI Cooper to just see if they actually worked well. I didn't want to buy both a set of LED bulbs and H4 conversion housings if they weren't any good. After installing them, I was very surprised. Light was much whiter and the brightness was great. I did read about how when converting, you are only supposed to do that with projector housings as the light direction is different. But on my MINI, it was just fine. So I ordered up the following LED bulbs (different style, but same manufacture) and headlight housings (with integrated DRLs):
http://www.amazon.com/New-5th-Genera.../dp/B0107MX0BG (looks like H4 may be tricky to find now with this brand)
http://www.amazon.com/Oracle-Lightin.../dp/B010U5OWSA
I decided to keep the halogen high beams stock. This cut my conversion cost in half. I don't drive a lot with high beams on, so I didn't want to spend the money. Maybe in the future, I'll convert them as well. For the housings, I made sure to find a set were the DRL wiring/bulb would not interfere with the buckets. Some have a big socket sticking out the side and I didn't want to cut up the buckets anymore then I had to.
So now it was time to remove the original bulbs. I put blue painters tape around the edges to protect the paint job. Using a large Philips screwdriver worked best to get a good grip on the shallow screw heads. Once out, I then unscrewed the headlight adjusters all the way out so I could remove the buckets. If the adjuster was too stripped, I had to pop it out of the bucket and use pliers to turn them. To my surprise, the rust wasn't that bad. I then outlined the back of the buckets and used a dremel to enlarge them so the new housings would fit. Some paint to cover the exposed metal and they were good to go. However, after an attempt at reinstalling later, I discovered there was a support beam back there that the headlights interfered with. So I had to grind that away as well (put the vacuum hose to collect the dust as I grinded with the dremel). Below is before and after. Not pictured is the paint I added to prevent it from rusting.
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Since most of my adjustment screws were toast, I ordered replacements from DMCH. After a few days they called me and said they were out and it would be weeks until they could ship. So I cancelled my order and did what I should have done at first which was to call Toby at DMC-NW. He cross-referenced a set that were the same length and thread pitch. However, they used T15 torx instead of Phillips. This was great in that they are easy to get a T15 torx bit in there to adjust and shouldn't strip as easily. When reassembling, I put anti-seize on the threads too so they wouldn't get as stuck as before. My only concern now is how well will the adjustments hold over time. I'll have to report back in a few years if adding that was a mistake or not. But at least I can easily readjust if necessary.
Now for the good stuff, the LED headlights! I picked the ones linked to above specifically because they had those large heat sinks on them. Most out there have a fan on the back. I didn't like that as I was worried about it failing overtime. Plus I wasn't sure if there was enough space for them to fit. They come with a little bracket that locks into place on the enclosure. You then add a rubber boot which seals around it and finally the bulb itself (insert and twist to lock). Here are some pics of the process.
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Here is a pic of the bulb being tested. While it was cold outside, the heat sink never got much above 108F at the base. I also confirmed the brightness was great, but I didn't look closely at the beam pattern. Big mistake as I'll mention further down.
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There was a tab and some ridges on the boot which made the fit into the headlight bucket tight, so I cut those off. I then cleaned the headlight sockets and moved the pins to the appropriate H4 locations. I plugged in the LED controller and tucked it back behind the bracket. I also pulled the DRL wiring through and to the side for connection later. Finally I made the connection to the controller and bulb and put the headlight into place. Tight fit but it went in there.
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After that, it was just a matter of reinstalling the trim to hold the headlight in place and repeat on the other side. The high beams were next but since I used the standard halogen bulb, they went right in real easy. I recommend a magnetic screwdriver too when putting those trim screws in place. All said and done, they look like this:
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When the next clear night came, I pulled the car out and tried them out. The whole street lit up. So I put my jacket over one side and used my T15 torx driver to adjust the other light. However, something didn't seem right. After a bit of driving around, it became obvious. All the warnings I heard about using LED/HID conversions came true. The beam was way too dispersed. Driving in a back road with lots of tries, it was obvious I was illuminating way to much above me and almost nothing directly head of me. It was very dangerous to drive like that as I needed my high beams to see directly in front. Not good.
So I pulled one out and hooked it up to my power supply while pointing it to the garage door. First pic is the old factory original halogen. Second is the LED.
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This is bad, I actually have a dark spot in the dead center! After thinking about it, I started to wonder if it was maybe because the LED bulb was a little bit on the long side compared to a halogen bulb. So I removed the boot and while the LED was powered, slowly pulled the bulb back out of the housing. Sure enough, about a quarter of an inch did the trick. The pattern narrowed and looked much better. So I decided to make a spacer out of the blank plate that came with the housings. Using a soldering iron, I melted the middle part out. Original next to the modified one:
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I put that into the housing followed by the adapter. Only problem is now the hold down clip doesn't work. But the screws to hold the clip are about the right hight. So I removed the clip and adjusted the mounts and sure enough, it holds everything nicely in place.
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I reinstall the boot and LED bulb. Connect back up and this is the result:
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I quickly perform the same mod to the other light and reinstall. After taking the bulbs in/out so many times, I'm getting rather good at it now. So I performed the same adjustment by doing them one at a time. I also have them point a little bit to the right to help insure I don't blind oncoming traffic. Here's what it looks like while driving (the surrounding area is illuminated, it just doesn't show up on camera).
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It doesn't have the sharp cutoff like modern lights do, but that's OK. It helps shine some light on signs which reflect the 6K light very well. When I walk towards the car on the driver side, it's not blinding me at all. So while technically not a legal setup, it's still in the spirit of the law and not blinding oncoming traffic.
Overall, so much better then halogen and use a lot less power too. As for the DRLs, I'll probably do another thread on those later. But for now I'm very happy and will consider doing the high beams at some point in the future. The only part I'm disappointed about is the LED bulb I use has two sets of LEDs on them. One for low and another for high. Even if you power both pins, it still shuts off the low beam LED. So instead of getting a full 3,000 lumens, I only get 1,500. With the high beam bulbs, I still get overall more light on the road. So not the end of the world and like I said, I don't use my high beams a lot as I typically drive on lit roads at night.
So if you want to do a conversion, be prepared to do some modifications. If you want to make it an easy conversion, then the JW Speakers are the way to go and should be much more plug-n-play.