I have installed a motion sensor in the kitchen, replacing the original light switch. I have a ceiling light fixture, which has six two pin Halogen GU 10 bulbs fitted and I replaced these with six LED bulbs. They worked fine until after a few minutes when they began to flash rapidly. Is there anything I can add to the light fitting to stop this happening or do I put up with the original Halogen bulbs? The Halogen bulbs are 40 watts each but the LED ones are only 3 watts each. Thanks!