94MS20 Rev. B4
2-1
2.
Safety
Questions have been raised regarding the possible danger of exposure to
UV for equipment operators using high power lights. We address this
issue in terms of overall safety of such lights.
OLEC
lights are UL
approved and meet the strictest US electrical and safety standards,
including all OSHA requirements. Users and dealers should insist on
U.S. safety approval. It is required by law.
The Nature of UV
UV rays have been divided into three categories: UV“A” from 400-
315nm, UV“B” from 315-280nm, UV“C” for the shorter waves. UV
extends to about 10nm but air will filter out most rays shorter than 200
nm. To put this into perspective, the “near UV” or UV“A” is immediately
adjoining the visible spectrum extending from the color violet. Violet
extends to about 380 nm; red is at the opposite end of the visible spectrum
at 700 nm (see Illustration: Electromagnetic Spectrum). Most light
sources, including light bulbs, emit a certain amount of UV.
UV, Source of Health
Before one becomes unduly concerned with the harm UV can cause, it is
important to understand the many beneficial effects connected with
working outside and in bright areas with a certain amount of the “right”
UV. The germicidal effect, for instance, can rid the air of bacteria and is
used for that purpose extensively in hospitals. Exposure of the skin to
UV produces Vitamin D, necessary for the formation of bones and teeth.
Exposure to UV“A” is essential to life itself. Most life, human, animal
and plant, depends on it for growth and health.
Bad UV
One must avoid UV“B” and UV“C” even in small doses. UV“A” is
harmful only through overexposure. Never confuse the effects of UV
with the great harm that can be caused by microwave and X-ray radiation,
much of such damage being irreversible.
UV in Nature
Sunlight contains an abundance of UV, UV“A”, “B” and “C”, and the
negative effects of overexposure to sunshine have become well known.
These are primarily sunburn, sore eyes, headaches. Cataracts and skin
cancer are caused by prolonged exposure. Very damaging is the
erythematic energy, UV“B”, that penetrates the natural filter of ozone in
the upper layers of the atmosphere.
Summary of Contents for OLITE
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