Light transformers are devices used to change the voltage and/or current of an electrical power source for use in lighting fixtures. They are typically used in low voltage lighting systems, such as those used for outdoor or decorative lighting, where a small voltage is required to power the lights. The transformer steps down the voltage from the main electrical supply to a lower, safer level that can be used by the lights. This helps to prevent electrical shock, reduce energy consumption, and improve the overall performance and efficiency of the lighting system.