Review on Leviton 70045: Durable 1 Piece Porcelain Lampholder for Reliable Lighting Solutions by Issac Smart

Mass production quality - not what Leviton sockets used to look like. I certainly wouldn't put a high power bulb in it - it would probably literally fall apart like the last one it replaced, with the ceramic collapsing from the heat. One of them simply fell apart from the heat of a spiral fluorescent lamp, not even an incandescent one!