Have always had very subtle outside lights at Xmas. One strand, yes they do flash. Positioned on low branches of a cherry tree in front garden. There is a barrier of conifers between my house and next door, so their view of lights is obstructed. They have icicle lights across front of their house and around a conifer. Our lights are always switched off by 10pm. Neighbour came around yesterday to say that our flashing lights keep her awake. Apparently, they creep under her curtain. My husband commented that we switch them off at night, but apparently she goes to bed at 8.30pm.She is renowned for petty complaints amongst the neighbours. I have always managed to escape her complaints. Shall I just leave them off?