John Bullough (Lighting Scientist)

And all the requirements for headlights are relative to the headlight itself. So that means headlights are pushing more light into the eyes of drivers, especially drivers who are driving passenger cars and sedans. Their eyes are lower to the ground and now they're looking at headlights that are higher mounted off the ground.

And all the requirements for headlights are relative to the headlight itself. So that means headlights are pushing more light into the eyes of drivers, especially drivers who are driving passenger cars and sedans. Their eyes are lower to the ground and now they're looking at headlights that are higher mounted off the ground.

Another factor is the fact that low beam headlights are very sensitive to the way that they're aimed. And when you shine your lights on a garage door for example, you see a broad horizontal band of light with a pretty dark area above and a bright area below. That bright area is supposed to be aimed slightly downward so that you're lighting up the road, which is what we want to see.

Another factor is the fact that low beam headlights are very sensitive to the way that they're aimed. And when you shine your lights on a garage door for example, you see a broad horizontal band of light with a pretty dark area above and a bright area below. That bright area is supposed to be aimed slightly downward so that you're lighting up the road, which is what we want to see.

Another factor is the fact that low beam headlights are very sensitive to the way that they're aimed. And when you shine your lights on a garage door for example, you see a broad horizontal band of light with a pretty dark area above and a bright area below. That bright area is supposed to be aimed slightly downward so that you're lighting up the road, which is what we want to see.

If those headlights are even mis-aimed just a little bit upward, that bright band of light is now going to be shining into other drivers' eyes. And we found that headlight aim, especially when they're pointed slightly upward, can really increase the amount of glare by a lot.

If those headlights are even mis-aimed just a little bit upward, that bright band of light is now going to be shining into other drivers' eyes. And we found that headlight aim, especially when they're pointed slightly upward, can really increase the amount of glare by a lot.

If those headlights are even mis-aimed just a little bit upward, that bright band of light is now going to be shining into other drivers' eyes. And we found that headlight aim, especially when they're pointed slightly upward, can really increase the amount of glare by a lot.

There are LED lights that are a warm white color that would look very similar to halogen lights, and they would be much more comfortable to look at at night. So that's one possibility. Another possibility, and something we probably should pay more attention to, is the aim of our headlights.

There are LED lights that are a warm white color that would look very similar to halogen lights, and they would be much more comfortable to look at at night. So that's one possibility. Another possibility, and something we probably should pay more attention to, is the aim of our headlights.

There are LED lights that are a warm white color that would look very similar to halogen lights, and they would be much more comfortable to look at at night. So that's one possibility. Another possibility, and something we probably should pay more attention to, is the aim of our headlights.

Headlight aim is something that some states, but not most, actually require as part of their safety inspections. So drivers could ask their mechanic once a year to have their headlight aim checked and to adjust it if needed.

Headlight aim is something that some states, but not most, actually require as part of their safety inspections. So drivers could ask their mechanic once a year to have their headlight aim checked and to adjust it if needed.

Headlight aim is something that some states, but not most, actually require as part of their safety inspections. So drivers could ask their mechanic once a year to have their headlight aim checked and to adjust it if needed.

Yes, the Federal Department of Transportation is very interested in the glare question. They've been getting a lot of complaints from the public

Yes, the Federal Department of Transportation is very interested in the glare question. They've been getting a lot of complaints from the public

Yes, the Federal Department of Transportation is very interested in the glare question. They've been getting a lot of complaints from the public

in the last 20 to 30 years about glare specifically and so they have been looking into what might be done certainly what could be done is some upper limits on the overall intensity from low beam headlights that's one possibility maybe some restrictions on the height of headlight heights on vehicles is another possibility so there are some things that could be integrated into regulations to help reduce the glare issue

in the last 20 to 30 years about glare specifically and so they have been looking into what might be done certainly what could be done is some upper limits on the overall intensity from low beam headlights that's one possibility maybe some restrictions on the height of headlight heights on vehicles is another possibility so there are some things that could be integrated into regulations to help reduce the glare issue

in the last 20 to 30 years about glare specifically and so they have been looking into what might be done certainly what could be done is some upper limits on the overall intensity from low beam headlights that's one possibility maybe some restrictions on the height of headlight heights on vehicles is another possibility so there are some things that could be integrated into regulations to help reduce the glare issue