Re: Re: blue headlights?

["Smith, Kirby A" <kirby.a.smith@lmco.com>]

dan_masi@mentorg.com (Dan Masi) commented:

	On Jul 16,  8:27am, Todd Young wrote:

	> These blueish tinted lights are called HID for High Intensity
	> Discharge. I can't remember exactly which element is used to
	> create the light, but I believe it's mercury. I know Lincoln
	> and BMW are using them. They are VERY expensive

	And VERY offensive.  While they may be more focused, the blue
	light they give off completely ruins your night vision for quite
	a while after the oncoming car has passed.  Lights that lean towards
	red don't affect your light sensitivity as much (nav stations
	on boats are always set up with a red overhead light, so that the
	navigator can read the charts and still be able to see at night).
	But these bluish lights are just awful.

It is not difficult to filter these lights.  The blue could be removed and
they would still be much more efficient and  the point source would still
simplify controlling the beam shape.

                .... Kirby   (Kirby A. Smith)
                              2 x 1988 90q
                          New Hampshire USA