Like Sun, LED Grow lights produce Ultraviolet A and Ultraviolet B rays to help plants grow. These rays might be harmful to human eyes and skin, but only when you get exposed to them for an extended period and at a high intensity. Do not worry, LED grow lights are not exceptionally intense. They emit a certain amount of UV and Blue rays appropriate for plant growth. If you do not stare at LED Grow lights for a lengthy period, you are safe.