Basic MR16 Gu10 bulbs of 6 work as expected but one. When the order came in I tried the bulbs out that weekend and all but one were in good condition. When I opened the package of one of them, since each of them is packed separately, I almost cut my fingers. One of the lamps came with the glass broken as the surface of the lamp was very sharp around the edges. I just put it back in my pocket because I didn't want broken glass everywhere. I left feedback for the seller; I hope they can send me a bulb that is in good condition. I'm waiting to hear.