Explain..

 

You're out in the middle of nowhere. You obviously want high beams on. This focuses the light 400+ feet down the road, where the rods in your eyes focus on. If you have foreground illumination (fog lamps) on, your rods are going to focus on that light, because they are closer and have more visible candela. Therefore rendering your high beams useless.

Ever notice why some manufacturers with split-beam headlights (like Chevys) kill the low beams when you switch to high beams? Its so that closer light doesnt change the focal point of your eyes. Our trucks do it too. Low beam mode only has the 55W (low beam) filament on. High beam mode shuts off the 55W low beam filament and engages the 65W high beam filament. If you want to engage both of them, you can pull the MFS all the way back to "Flash to Pass" function.

I have my fogs on a separate switch. I can feel a strain on my eyes when I'm driving for hours with my fogs on. When I shut them off, the strain in my eyes goes away and the high beams appear brighter.

 

Makes sense...so more light does not always equal better. Good post!

 

Exactly.

 

Huh never thought of it like that but it all makes a lot of since! Ill have to drive around and see if it will or not. If so then I like your idea and make a seperate switch for it! You surely know a lot about the human eyes!

 

Because most dual filament bulbs will overheat and melt the housings if both filaments burn for extended periods of time.

that why its "flash" to pass not "hold it back and see what happens"

 

Exactly. I was stating that for people who think our high beams are a combination of both.

 

haha yea I never touch that flasher except when I want to "flash" the high beams of course but I rarely do that. That is why it is only a spring pull then a flip switch.