On Thu, 25 Oct 2018 23:39:26 +0000 (UTC), danny burstein
wrote:

In Clare Snyder writes:

ANd LED lights do not emit ultraviolet so they don't cause color
fading.

Many do, in fact.

Causes problems in professional photography. Quoting a friend
in another thread:

"They don't leak a lot of UV, but they leak
enough that blue flowers will turn pink when photographed ..."

From premierltg.com

Some in the lighting business have stated that LEDs do not produce UV
radiation. However studies have shown that standard LEDs do create a
small amount of UV. That said, the amount of UV they actually emit is
even less. This is due to the phosphors within an LED lamp that
convert the Ultraviolet light to white light.

We all know that exposure to UV radiation leads to sunburn, and in
extreme scenarios can lead to eye problems, skin cancer, weakening of
the immune system, and more. Fortunately, most artificial light
sources do not emit enough UV for this to be a real concern. CFL
lamps, already a worry for their mercury content, are being studied
for the UV they put out. While not emitting a significant amount of
UV, some people who are very sensitive to UV may be affected by the
amount of UV produced by CFLs. Health Canada recommends that people
keep a distance of 30 cm or more from any light source.

An additional concern with UV output is color degradation. CFL and HID
lamps have been known to cause damage to shades, carpets, painted
surfaces, and more due to UV emissions. This has been another
motivating factor for places like museums to retrofit to LED.