I have recently had a problem with my floor lamp that I got from Ikea a few years back. The dimmer switch on it stopped working so I have just changed it to a regualr cordline switch. When I wired it up and switched it on the whole thing flashed and all 7 small 10W halogen bulbs blew. They are pronged bulbs and I believe you can get them up to 20w. Will new higher voltage bulbs fix the problem or could it be something else?