Spud, I am looking forward to your findings, and I'd like to know what bulb you are using.

I noticed that J&P Cycles sells an H4 "PathfinderLED" bulb that appears to have no fan and would seem to be a direct plug-in fit. Price is about $44.

I have now experimented with the Zongshen LED headlight, and three different bulbs in the stock headlight. ;) I have used the stock HS1 bulb, an H4 incandescent bulb, and my latest experiment is with an 18W, H4 LED bulb I bought from eBay.

http://i.ebayimg.com/00/s/NjIwWDYyMA..._id=880000500F

You can purchase this LED bulb from China for $14, delivered. Because I didn't wish to wait, I purchased the bulb from the United States for $21. ;) Cyclops is selling this LED bulb for $60, plus shipping, with a 1-year warranty.

http://www.cyclopsadventuresports.co...orts_p_97.html

The H4 LED bulb performs very well, and I like it a lot. :tup: I am still contemplating whether the H4 incandescent bulb, or the H4 LED bulb is best. ;) The LED bulb offers excellent conspicuity, even in daylight. Here is a photograph I took at midday of the H4 LED bulb from 20 yards, in a standing position.

http://i442.photobucket.com/albums/q...psp3zmhw2k.jpg

Here is a photograph I took at midday of the H4 LED bulb from 20 yards, in a kneeling position.

http://i442.photobucket.com/albums/q...pspeluizud.jpg

I think the H4 LED bulb offers better daylight conspicuity than the Zongshen LED headlight. For comparison, here is a photograph I took at midday of the Zongshen LED headlight from 13 yards, in a standing position.

http://i442.photobucket.com/albums/q...psykwucyp5.jpg

Here is a photograph I took at midday of the Zongshen LED headlight from 13 yards, in a kneeling position.

http://i442.photobucket.com/albums/q...psrcvyuahg.jpg

Since the light beam is not so narrowly focused, the H4 LED bulb is much more conspicuous in daylight than the Zongshen LED headlight. :tup:

In comparison to the H4 incandescent bulb, the H4 LED bulb casts more light to the sides of the motorcycle, so it illuminates the road better while turning corners on pavement, and while trying to avoid obstacles while riding off road after dark. :) In addition, the H4 LED bulb uses less power, generates much less heat, and lasts far longer than an H4 incandescent bulb. However, the H4 incandescent bulb definitely projects the light farther down the road, especially on high beam.

I will experiment more, and let you know my final conclusions after more deliberation. However, I will offer these preliminary conclusions. ;) If you are riding fast at night on mostly straight pavement, the H4 incandescent bulb will let you see farther. However, if you are riding a lot at night in the city, or riding at night more slowly on winding paved roads, the H4 LED bulb will illuminate the corners much better. :) Also, the H4 LED bulb will make you much more conspicuous during daylight than the H4 incandescent bulb. ;)

Incidentally, these H4 LED bulbs are very water resistant, if not waterproof, as shown in the following video. ;) I installed a similar H4 bulb in my Honda CRF250X, and it has performed superbly for me. :tup:

https://www.youtube.com/watch?v=kbY-Xk4y6_k

Thanks for the comparison update, Spud. Especially good to know is the difference in pattern.

Is it just me, or does the sky in your pics look a bit hazy? I've been following the news about wild fires in the NW region.

Indeed, the sky is filled with smoke in Idaho. :tdown: I hope they can extinguish these forest fires soon. :ohno:

LED Bulb Options
 

I have not taken my headlight assembly apart yet. Would this LED bulb fit without modifications? Or do you need to cut some space and modify the rubber boot to fit the fan part of the bulb?

FYI there is a PathfinderLED H4 bulb with no fan that probably would fit without mods, but I just learned it only puts out 700 lumens. The PathfinderLED 2000 lumen bulb has a fan and looks similar to the one Spud referenced. Both of these bulbs are about $44 on J&P Cycles.

Spud's bulb is 3600 lumens, or so Cyclops claims.

Yes, you do need to make a few modifications to the headlight. I will try to capture some photographs, and post a thread on this topic, tomorrow. :)

I did take photographs of my LED bulb installation, but I haven't had time recently to post them. I will try to update the tread as soon as I can. ;)

I switched back to the standard H4 bulb for further testing. Without a doubt, the H4 incandescent bulb is best. :tup: If you are not having heat problems with the headlight reflector, you can't beat a 55W/60 H4 bulb. ;) If you are concerned about heat damage, I think the H4 LED bulb is next best. The stock, 35W HS1 bulb is anemic, and the Zongshen LED headlight is too narrowly focused for my tastes. The Zongshen LED headlight might work well with the appropriate auxiliary lighting, but I find it unsatisfactory when used alone.

I'm using an H4 silverstar ultra and it provides a powerful white light with a nice wide spread. I am a little worried about heat so I cut the back off the assembly for extra ventilation.

Yes, I cut the back from my headlight assembly for two reasons. I want to allow the extra heat produced by the hotter H4 bulb to escape, and to help preserve the plastic headlight reflector. Also, sectioning the back of the headlight assembly makes it much easier, and quicker, to change headlight bulbs. ;)

http://i442.photobucket.com/albums/q...psnp8utdyc.jpg

RX4 headlight on RX3
 

One of my facebook friends bought the Zongshen RX4 headlight and plug it on his RX3. He said just plug it in and it fits perfectly without no extra bracket. Additionally, it's much brighter than the original led and halogen headlight.

Here are the pictures:

Hi, can you please provide a link to where to buy such headlight?

Thanks!

Juanro

LOL :) It makes it look even more like a Mini GS with that light installed! Excellent to know there is another option out there. Thx for sharing!

Juanro...a remarlaaaa
 

a remarlaaaa---¡¡