發光二極管是否含紫外線?

LEDs do produce a small amount of Ultraviolet (UV). This small amount of UV is converted to white light by the phosphors inside the lamp. Hence, practically only negligible amount of UV will be emitted out.

You may refer to the following web-page for more details:

http://www.leapfroglighting.com/lighting_and_uv_radiation/

紫光發光二極管就有紫外線