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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.
Then thereâs periodic lamp replacement. BenQâs specs state that the lamp should last between 3,500 and 6,000 hours, depending on the lamp mode used, and the current replacement price is $249. That stated lamp life is more generous than most, though it may be optimistic if your goal is to maintain like-new performance.