What happens to the energy wasted in a light bulb?

electircal or photo electrical energy. Photons are shot across from panel to another panel this sparking back and forth creates the light you see.

Answer: Electricity is the energy input into a light bulb. It either heats afilamanet to produce heat and light, r excites the gas contained in the bulb (in flluorescent tube) to emit visible light directly or emit UV light which interacts with a phosphor coating in the tubes to emit light.