And then there was light, the metal halide kind. Made by Advanced Lighting Technologies (ADLT), metal halide simulates sunlight more closely and efficiently than other technologies. ADLT subsidiary Venture Lighting produces metal halide lamps and ballast systems. Its lineup includes lamp components, power supplies, and lamp-making equipment for commercial and industrial markets. ADLT's Materials segment makes the metal halide salts used in its products as well as sells the salts to other manufacturers. Via its Deposition Sciences subsidiary ADLT also produces durable thin-film optical coatings for industrial, medical, and biological sciences instrumentation.