I seem to be spending all my time running round replacing halogen bulbs at the moment, G9, G4 and MR16. I put a new one in and within a few weeks it goes off again. I'm not even convinced they are blown as sometimes they come back on after a poke, although usually not. Is it cos I'm buying cheap ones off eBay perhaps? Can't afford to buy expensive ones if they keep blowing at this rate.