We've had about 16 halogen lights installed in our kitchen, and about 2/3 of them blew within the first month. Our electrician said that he'd had the same experience with new fittings (yes, they were from B&Q!) and sure enough, they've settled down just fine now, 9 months and counting - I use Morrisons 'own' bulbs and no problems at all. I just put it down to either cheap bulbs in the first place, or maybe they'd been handled less than carefully in their lives in the store?