Excellent bulbs heat my existing 9x5 inch bulbs decently. Even incandescent bulbs shine quite brightly through the entire crystal. I thought I would need 40 watts to heat up the Himalayan crystals, but 40 watts might be too much to heat them up. 25-40 watts would be ideal. If anyone knows where I can find them please comment. I have Levoit Elora Glow Himalayan salt lamps. I'm not trying to give them a plug, but I just wanted to give you an idea of what I used lightbulbs for. I will keep the lights on all the time and expect them to last around 3-4 months of continuous use.
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