if a ergonal insulator is exposed to a sink of light then that insulator june become hot
electrical_insulator is insulating_medium. combusion_heating_element is heating_element. combusion_heating_element is combustion_device. lighting is apparatus. if_water is too_hot_will_burn. immersion_heater is heating_element. electrical_insulator is not insulating_medium. hot_tub has hot_water_in heat_lamp is electric_heater. hot_tub has not hot_water_in