a light bulb generates visible light when it is turned on
car_light_bulb is light_bulb. light_bulb is light_source. light_bulb is electric_lamp. incandescent_bulb is light_bulb. visible_light is electromagnetic_radiation. light_bulb is electrical_component. if_bulb is broken_does_not_make_light. light_bulb is lamp. halogen_lightbulb is incandescent_bulb.