<human>:  What is the difference between fluorescence and luminescence?
<bot>: The main difference between fluorescence and luminescence is that fluorescence is the emission of light from a material in response to being exposed to light, while luminescence is the emission of light from a material in response to some form of energy other than light, such as electrical energy, heat or magnetic fields. In fluorescence, the energy present in the incoming light is converted into lower energy light, usually of a different color. In luminescence, the energy is converted into light of the same color as the energy source.