Designed for easy installation, consistent performance and longevity, Lumina Lighting® Transformers are the best on the market and the ideal choice for any low voltage outdoor lighting system. All Lumina Lighting® transformers are backed by our warranty and are ETL listed to UL standards. They each feature Toroidal cores, weatherproof stainless steel cabinets, timer and photocell receptacles and magnetic secondary circuit breakers for each 300W common circuit.