I bought it more than a year ago, but the review is only now. Built into an ozone generator. Glows as expected but without ozone. I've tried incandescent bulbs (2) every way I can think of, but nothing seems to have changed. I threw them away and bought a new ozonator. I took a lightbulb from the new block and checked it in the old block - everything works! Therefore I am not convinced of this product. If there is a trick to making them work, the seller should document it. I would put zero if I could.
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