I bought two packs about 3 months ago and I'm still using the first bulb. I have my Grande on a timer and it has been on for 10 hours every day since the day I set it up. I think the trick is to keep the oil off the skin of the bottle and gently place the lava lamp on the stand. I took that advice and as I said I'm still using my first lightbulb. Maybe I'm lucky, I don't know, but I buy these bulbs for life! Edit: Still on the first bulb. 6 months of daily use and everything is fine. As long as you're careful during installation and don't touch the bulb with your fingers, and careful when you put the bottle back on, you should be fine. Second edit: finally the lightbulb lights up. 7 months of daily use. I would call it a legitimate success.
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