Reflective light is the one that bounces off an object, like a mirror, whereas Emitted light is the one that can be generated through matter which is in an excited state. This state can come from a variety of sources, like smartphones, laptops or LED lights and television.
The emitted light is more dangerous to your eyes, as it could damage your retina in a serious manner, as these lights discharge from one point of source, which directly hits into the retina. Hence, there are certain measures to be taken in order to protect your eyes from these lights.