How does lightning give off light?

Answer 1

there are small cold ice cubes in clouds and once there is a really bad storm they start moving and they start bump into each other witch makes a electiric zap and the zap beacomes so much full of energy it gives out the most extrodinary colours witch we call " lightning"

Answer 2

Lightning gives off light through a process called ionization. During a lightning strike, the electrical current passing through the air heats it up and causes the air molecules to ionize. As these ionized molecules recombine and release their energy, they emit light in the form of a bright flash that we see as lightning.