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2 of 3 will work well. One of them exploded after turn my lava lamp. Then I tried with another and it worked. For the price its ok, but also you need to wait a bit to receive them. And also hopefully you don't have any faulty bulb.
I think these get too hot for use in lava-lamps as they appear to destroy themselves through overheating. May be fine for a conventional lamp, but not an enclosed one.