Howdy all,
This one goes out to those of you with the 2015-18 ST2/3/RS's that have the Adaptive headlights...in the past, I've come across a few posts where people attempt to retrofit either blue-hued halogen PSX24W bulbs, and in some cases (improperly-designed) LED bulbs from Amazon. However, most remark that the LEDs either add output but scatter the beam pattern, or render the cornering light absolutely useless due to the optics being so far off from stock. After studying the design of the cornering lamp in this particular light, I've devised a solution!
IMPORTANT: You need to make sure to buy LED PSX24W bulbs that are the "dual-sided" design. You CANNOT use the ones that are round and have a zillion LEDs all over them, and you CANNOT use the ones that have like 3 or 4 LEDs facing up/down/left/right, or are in a triangle configuration. These WILL NOT WORK. It HAS to be the dual-sided kind.
With that bit out of the way, essentially you will need to modify the plastic bulb bracket so that the bulb is clocked 45º clockwise (passenger side) or counterclockwise (driver side) if you're looking at the bulb from the rear. This points the LED output directly at the reflector inside the light, which then directs the beam into the proper pattern, producing useful output.
Here are the exact bulbs I purchased on Amazon that worked beautifully for this installation (not sponsored):
I made a YouTube video that visually walks you through the theory and installation process to make this work, I will post it at the end of this post! Below are some photos of the installation process and the output:
LED installed with proper clocking/positioning (passenger side):
Output Pics:
I'm really happy with the results, it's literally a night-and-day difference if you get the beam pattern right!!
Here is the more detailed walkthrough/explanation on YouTube:
Hopefully this helps some of you guys out, thanks for the read!
Cheers
Ben
This one goes out to those of you with the 2015-18 ST2/3/RS's that have the Adaptive headlights...in the past, I've come across a few posts where people attempt to retrofit either blue-hued halogen PSX24W bulbs, and in some cases (improperly-designed) LED bulbs from Amazon. However, most remark that the LEDs either add output but scatter the beam pattern, or render the cornering light absolutely useless due to the optics being so far off from stock. After studying the design of the cornering lamp in this particular light, I've devised a solution!
IMPORTANT: You need to make sure to buy LED PSX24W bulbs that are the "dual-sided" design. You CANNOT use the ones that are round and have a zillion LEDs all over them, and you CANNOT use the ones that have like 3 or 4 LEDs facing up/down/left/right, or are in a triangle configuration. These WILL NOT WORK. It HAS to be the dual-sided kind.
With that bit out of the way, essentially you will need to modify the plastic bulb bracket so that the bulb is clocked 45º clockwise (passenger side) or counterclockwise (driver side) if you're looking at the bulb from the rear. This points the LED output directly at the reflector inside the light, which then directs the beam into the proper pattern, producing useful output.
Here are the exact bulbs I purchased on Amazon that worked beautifully for this installation (not sponsored):

Amazon.com: Nilight EF2 2504 LED Fog Light Bulbs, 250% Brightness, 5,0000 Hours Long Lifespan, 6000K Xenon White Fog Light Bulbs, PSX24W LED Fog Light DRL Bulbs Replacement, 2-Pack : Automotive
Buy Nilight EF2 2504 LED Fog Light Bulbs, 250% Brightness, 5,0000 Hours Long Lifespan, 6000K Xenon White Fog Light Bulbs, PSX24W LED Fog Light DRL Bulbs Replacement, 2-Pack: Driving, Fog & Spot Lights - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
www.amazon.com
I made a YouTube video that visually walks you through the theory and installation process to make this work, I will post it at the end of this post! Below are some photos of the installation process and the output:
LED installed with proper clocking/positioning (passenger side):
Output Pics:
I'm really happy with the results, it's literally a night-and-day difference if you get the beam pattern right!!
Here is the more detailed walkthrough/explanation on YouTube:
Hopefully this helps some of you guys out, thanks for the read!
Cheers
Ben