This Vivosun 1000 watt electronic ballast was an open box return item. It has never been used to my knowledge. It is in excellent condition, as though it just came out of a sealed box. The unit was tested to be in operating condition by connecting it to a metal halide lamp (see pictures).Thank you for your interest in this item. The item "VIVOSUN 1000 Watt Dimmable Electronic Ballast for Grow Light HPS MH Bulb" is in sale since Friday, June 5, 2020. This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Hydroponics & Seed Starting\Grow Light Ballasts". The seller is "theauctionstore" and is located in Orange, California. This item can be shipped to United States.