Update: The company responded very quickly and refunded my money. I bought these because I was having trouble finding oven lights. They say they fit the 570F. I've had them in the oven for less than 2 months, no higher than 450F. Last week they started falling out of their own nests! They are in closed glass frames. I checked why they were already out. Glass flasks hung from internal wires. No, I didn't over-tighten them or try to pull them out. They had detached themselves from their brass sockets and were hanging freely in their holders! I have to turn off the power and try to pull the brass piece out of the socket! There is no obvious way to get them back on Amazon.
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