Are these legal? I've seen this guy every morning coming in the opposite direction with blue fogs....can you use them in the daytime?

 

It depends on your state. They are really blue, and aren't hid's, then they are probably not too good at night.

 

i paid over 200 for 9dollar superwhite lights in WA. Didnt help that it was a Honda. I never get pulled over anything in my 4runner now tho.

 

Not sure if they're legal or not, but they will work like crap in real fog. Yellow lamps seem to work best in fog as far as I can tell.

 

i'm pretty sure up here in ontario, that blue lights on passenger cars are illegal. someone i work with got a ticket for having blue turning lights. the blue lights on vehicles here are designated for slow moving vehicles, like snow plows. (maybe they'd be allowed in the 3.slows?)

 

Most states don't allow _really BLUE_ lights on a civilian vehicle, 'cause that color is reserved for police.

Blue is a horrible color for enhanced visibility in fog or rain. The reason is that water (drops / droplets) refract **blue** light - giving 'haze or visual noise' in the blue part of the visible spectrum. In other words, fog 'bounces' blue, and feeding it blue light doesn't help at all...

Blue colors are in the end of the spectrum with the shortest (relative) wavelengths. To get enhanced visibility through short-wavelength refraction haze, you need to use a longer-wavelength light. Amber or orange are the best at cutting through water-refraction blue. Yellow is the usual compromise. Same basic principle as those amber-tinted 'rain glasses' that aid in seeing through rain and fog haze.

To be fair, blue/white is a decent color for bringing out edge details at night when airborne water interference is not a factor.

 

those "blue" lights sound like cheap HID imitations they aren't really intended as fog lights but rather "driving" lights. Some packaging even says not to be used in rain/fog conditions. Here in Ontario there is a kind of catch 22, if the vehicle came with them from the factory then its OK but if you put them on after its illegal. Most cops I've talked to don't seem to have a problem with them as long as they are properly aimed and are'nt causing a problem. You could try the arguement "they were on it when I got it sir I did'nt know they were illegal." They will hassle you if they stopped you for doing something else like speeding or whatever though. They seem to use it has an add on offence to pad the ticket book. Merry Cursemas aviator :-)