The mogul base pulse start metal halide product line offers high performance lamps which provide up to 20% energy savings while achieving higher lumen output making them the preferred product for sustainability. less color shift, faster warm up times and shorter restrike periods make them the consumers' choice for HID lighting. high intensity discharge, or HID lamps, as they are commonly called, are a lighting mainstay for commercial applications, indoors or out. our HyGrade™ brand covers all the HID technologies; mercury vapor, metal halide and high pressure sodium. Manufactured to the highest quality standards, our HID lamps are in service in virtually every state, in every type of business. Satco HyGrade™ high intensity discharge lamps are perfect for large indoor or outdoor open areas such as parking lots, street lighting, warehouses, anywhere high lumen output is critical. Metal halide lamps are similar to mercury vapor models except for the addition of metal halides of sodium iodide and scandium iodide. Certain metal halide lamps feature other iodides to improve the efficiency and color balance of the lamp. Metal halide represents the most popular and widely used HID category.