1000W HPS VERSATILE! Automatically converts between HPS or Metal Halide! CONVENIENT! Use 120 volt or 240 volt power sources! QUIET OPERATION! Durable construction and rubber feet reduce noise and vibration! DURABLE! Powder coated aluminum housing and heavy-duty construction are built to last. COOL RUNNING! Air vents and heat shield convection cooling help reduce heat and energy waste! GOES WHERE YOU NEED IT! Heavy-duty keyholes in durable handles allow mounting on walls or ceilings for optimum placement and convenience! EFFICIENT! Soft starting saves energy, eliminates lamp flickering, prevents lumen depreciation, and increases lamp life! Simply visit your local hydroponics shop and tell them you want to try this new magnetic ballast from Advanced Nutrients and you’ll get the chance to prove to yourself … for the next six months … in your own grow room … this ballast is exactly what you’re looking for without risking your hard-earned money.