A
Arthur Entlich
Although I agree that fluorescent bulbs do not typically emit as much UV
as natural daylight, Livicks's statements that:
"FLUORESCENT LIGHTING DOES NOT CONTAIN MUCH OF THE NASTY SPECTRUM OF
LIGHT, ULTRA VIOLET RAYS, THAT CAUSE INK JET PRINTS TO FADE.
CONSEQUENTLY FLUORESCENT LIGHTING IS VERY SLOW, IN FACT FEEBLE AND
ARTHRITIC WHEN IT COMES TO FADING PIGMENTED INKS."
seems to me to be overstating (or understating) things considerably.
The way fluorescent tubes function is by exciting mercury and argon
gases which then causes them to emit UV which is then made into
something approaching white light through the phosphorescence of the
phosphor coating on the inside of the glass tube. All fluorescent
lights therefore give off UV light, and those which are not specially
filtered to limit UV give off a fair amount. Certainly more than
incandescent lamps do.
All light spectrums cause some fading, and indirect lighting of any
sort, including daylight, doesn't reflect UV to the source, so indirect
daylight reflected off walls, etc, has less UV in it than direct
fluorescent does.
No one should expose color images to direct daylight, and that is pretty
much a rule to live by. Further, even window glass filters out
considerable daylight UV.
Art
as natural daylight, Livicks's statements that:
"FLUORESCENT LIGHTING DOES NOT CONTAIN MUCH OF THE NASTY SPECTRUM OF
LIGHT, ULTRA VIOLET RAYS, THAT CAUSE INK JET PRINTS TO FADE.
CONSEQUENTLY FLUORESCENT LIGHTING IS VERY SLOW, IN FACT FEEBLE AND
ARTHRITIC WHEN IT COMES TO FADING PIGMENTED INKS."
seems to me to be overstating (or understating) things considerably.
The way fluorescent tubes function is by exciting mercury and argon
gases which then causes them to emit UV which is then made into
something approaching white light through the phosphorescence of the
phosphor coating on the inside of the glass tube. All fluorescent
lights therefore give off UV light, and those which are not specially
filtered to limit UV give off a fair amount. Certainly more than
incandescent lamps do.
All light spectrums cause some fading, and indirect lighting of any
sort, including daylight, doesn't reflect UV to the source, so indirect
daylight reflected off walls, etc, has less UV in it than direct
fluorescent does.
No one should expose color images to direct daylight, and that is pretty
much a rule to live by. Further, even window glass filters out
considerable daylight UV.
Art