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Once it cools, it should function properly again. A lava lamp may overheat in eight to 10 hours, depending upon the bulb and brand of lamp. Use the lamp for less than eight hours at a time for best results, allowing it to cool to room temperature before using it again.
A little preventative maintenance can help your lava lamp to continue working for years. 1  Never shake the lamp. 2  This will cause the water to become cloudy. 3  Never store the lamp in direct sunlight. 4  This will cause your lavaâs color to fade. 5  Turn off the lamp after eight-ten hours of use. 6  Itâs just a good idea.