must be luck then. i have had 100/90w superwhites in my x for over a year. not a problem!!(except a bulb burnout, which the seller on ebay replace free, after the warranty peroid) one of the sellers on ebay, midnightgoose-stands behind her products. she answers all her e-mails promptly. replaces any defective merchandise,etc. i am very pleased with my bulbs!

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