RysiuM
New member
Which LED or HID work and don't work in 2010-2013 low beam reflector type headlights
There was a thread (unfortunately deleted by OP probably) about installation of LED IMPORT USA bulbs as low beam in 2012 4Runner. I had to disagree with OP who recommended these bulbs. From the pictures "before" and "after" we could easy that after installing these bulbs low beam lost the cut off and obviously would blind other drivers. It's a pity the OP removed all pictures (very valuable for comparison) leaving only two (see below) showing clearly the main flaw in Led bulb application. Looking at the photos you can see that LED bulbs do not produce cut off like halogen bulbs do, what means these LED lights will be blinding not only the drivers on the oncoming traffic but also the guy in front (the dimming mirror will not help this poor guy).
In my research I found that there are two issues related to LED chips vs halogen filament that might screw up the projection. Both are related to the fact that the light source (filament) in standard halogen bulb is exactly at the center of the bulb and has 360 degree even projection to the side.
1. Led chips are usually located on both sides of flat mounting blade, so the light source will never be exactly at the center of the bulb. So there are two light sources a little bit off the center of the bulb. The low beam projection cut-off may be screwed up by that.
2. Each chips have roughly 120 degree projection angle (lambertian), so there is almost no light in the surface extending the "blade". This can create "black spots" in the projection.
While some projector type housings are not sensitive to these problems, all reflection type housings I heard of don't work correctly with LED bulbs on low beam.
So I'm calling all you guys who had experience with LED or HID bulbs installed in 2010-2013 4Runner low beam headlights. Show me your projection, if the cut-off is there (or maybe better), and the lighting area is even or better than the stock halogen bulbs. I am looking only for 2010-1013 reflector type headlights, not 2014+ projectors. For the reference here is the cut-off line from stock halogen bulbs.
An for the first there is a comparison photo of LED IMPORT USA bulbs (from the thread deleted by OP)
There was a thread (unfortunately deleted by OP probably) about installation of LED IMPORT USA bulbs as low beam in 2012 4Runner. I had to disagree with OP who recommended these bulbs. From the pictures "before" and "after" we could easy that after installing these bulbs low beam lost the cut off and obviously would blind other drivers. It's a pity the OP removed all pictures (very valuable for comparison) leaving only two (see below) showing clearly the main flaw in Led bulb application. Looking at the photos you can see that LED bulbs do not produce cut off like halogen bulbs do, what means these LED lights will be blinding not only the drivers on the oncoming traffic but also the guy in front (the dimming mirror will not help this poor guy).
In my research I found that there are two issues related to LED chips vs halogen filament that might screw up the projection. Both are related to the fact that the light source (filament) in standard halogen bulb is exactly at the center of the bulb and has 360 degree even projection to the side.
1. Led chips are usually located on both sides of flat mounting blade, so the light source will never be exactly at the center of the bulb. So there are two light sources a little bit off the center of the bulb. The low beam projection cut-off may be screwed up by that.
2. Each chips have roughly 120 degree projection angle (lambertian), so there is almost no light in the surface extending the "blade". This can create "black spots" in the projection.
While some projector type housings are not sensitive to these problems, all reflection type housings I heard of don't work correctly with LED bulbs on low beam.
So I'm calling all you guys who had experience with LED or HID bulbs installed in 2010-2013 4Runner low beam headlights. Show me your projection, if the cut-off is there (or maybe better), and the lighting area is even or better than the stock halogen bulbs. I am looking only for 2010-1013 reflector type headlights, not 2014+ projectors. For the reference here is the cut-off line from stock halogen bulbs.
An for the first there is a comparison photo of LED IMPORT USA bulbs (from the thread deleted by OP)
