Review on Philips 421438 53 Watt Dimmable EcoVantage by Lloyd Rodriguez

I bought them as a backup. They sat unopened in my garage for over 6 months. When the lights in my kitchen started to burn out I wanted to replace them with these and only 2 of them were usable. The screw base threads were wobbly/uneven/bent so I couldn't screw them into the drill chuck. Of course, I missed the return deadline, so I paid over $50 for 2 working bulbs and 4 junk ones. Dissatisfied.