Driving round the inner ring road at Stockton-on-Tees last week I spotted softly glowing colours opposite the "Daylight Bakery". It transpires that many gravestones in the cemetry are decorated with solar-powered lights. Is this unique? How long has this sort of thing been going on? Who starts it? Would you do it? I live in a small village in Norfolk and no-one I've spoken to here has heard of anything like it. I'm not sure how they would respond if it happened.