Light is a form of energy.
Visible light is just a small section of the electromagnetic spectrum. Red, Orange, Yellow, Green, Blue, Indigo, Violet. The red end of the spectrum has longer wavelength and lower energy, the violet end of the spectrum has shorter wavelength and higher energy. Infra Red is also a form of light energy, but the wavelength is too long for the human eye to detect it. Infra Red can be detected by speccial photographic films and by some animals such as the pit viper.