Whatever product you use should emit only visible light, because ultraviolet light damages the eyes.
不管你用什么产品，都应该只发出可见光，因为紫外线会伤害眼睛。
2
Absorption spectrum a plot of the absorbance by a substance of radiation at different wavelengths, usually of ultraviolet, visible, of infrared radiation.
吸收光谱：记录物质对不同波长的光，通常是紫外光、可见光或红外光吸收情况的图。
3
The structure of PDBOPV is characterized by ultraviolet? Visible absorption spectrum.