... other contamination. No pollution to the air. 4.The industrial light is controlled by constant current and constant voltage. Its working ... can overcome the electrical grid, noise pollution and unstable light caused by ballast. It can also eliminate the glare and ... ,supermarkets, exhibition halls, gymnasium, and some other places where need industrial lighting. 30W, 50W, 80W, 100W ,150W,200W ,240W,320W ...