Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't waste your money

These bulbs took a bit to warm up and come up to full brightness which was great in the morning when my eyes were adjusting, but inconvenient any other time. One by one these bulbs "stopped working" after about 3 - 4 months. I say stopped working, because they didn't burn out. The ballast (a switch built into the base of fluorescent bulbs) seemed to go out. One of the bulbs would go on and off if you thumped it. After three of the six bulbs went out, I went and bought "normal" incandescent bulbs for the bathroom. Also, these bulbs were much, much more expensive and not worth it. Don't waste your money.