I've got a mate whose a gardener (legal kind) and he said the same thing.... Also, I was in holland at the weekend and someone there was saying the same thing too...... I always thought it was 12/12 only to be honest......13 hours dark, 11 light. Then down to 14 hours dark, 10 light. I probably wrote it the wrong way around... The idea is it simulates the days getting shorter at the end of summer