They will not fit the 16" lava lamp I bought them for. They are slightly shorter than standard household bulbs and the lamp collar prevents them from being screwed into the socket far enough. They had to replace a 40 watt supermarket bulb I bought as the original lava lamp bulb blew out last April after about 3 years. The replacement bulb at the supermarket was for a 6pm ceiling fan and lasted about the same amount of time. They fit into a smaller oven outlet though so I can't go back now but we will have spares for the oven. I couldn't give grades without giving an overall grade, but I shouldn't give it at all as I wouldn't be able to use it. But the delivery was very fast.
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