Panasonic Mercury Vapor HID Lamp HF400X/N, E39 Socket - Model Name: HF400X/N - Socket Type: E39 Thank you for viewing. This is an unused item that was stored in a warehouse. I have not been able to confirm whether it lights up as I do not have the necessary equipment. Please note that this item has been stored for a long period of time and is sold as-is, with no returns accepted.