This training module contains information about the risks posed by ultraviolet radiation (UV), the effects of sunlight, and steps you can take to protect yourself from over exposure.

Of course, mere exposure to the sun is not the entire story.  The effects are dependent on you, your level of pigmentation, how much of a tan you already have as well as the nature of your skin.   Production of your skin's pigment, or melanin, is stimulated by sun exposure and does reduce your risk of sunburn once you are already tan.  Be aware that even dark-skinned individuals can be sunburned and damage their skin with over exposure.   Obviously, fair-skinned individuals need to exercise more caution.  You should also be aware that the sun's rays have different intensities at different times of the year.

First, avoid being in the sun for prolonged times when it is highest overhead and therefore the strongest (normally from 10:00 AM until 4:00 PM in the northern hemisphere).  If you are in the sun between these hours, be sure to apply protective sunscreen.  Most sun damage occurs as a result of incidental exposure during day-to-day activities, not at the beach.

Even on cloudy, cool, or overcast days, UV rays travel through the clouds and reflect off sand, water, and even concrete.   Clouds and pollution don't filter out UV rays, and they can give a false sense of protection.  This "invisible sun" can cause unexpected sunburn and skin damage.

Check out OSU EHS's online Sun Safety Information Library for additional information.

What is UV Radiation?

UV Index

Effects of Sunlight

Guidelines for Protection

Sun Quiz

This training module was created by Wanida Kongpunpugsa (Internship student) under the supervision of Leslie Miller, Safety Training Coordinator.