Is there a bike light law?

Which bit is vague?
*Road Vehicle Lighting Regulations 1989 (amended in 1994 and 2005) require pedal cycles to have various lights and reflectors fitted, clean and working properly, when being ridden on a public road between sunset and sunrise*

mmm yea i suppose. But it doesnt say you cant put them on your persons. I do. My light 'clip'# broke so i cant attach it to the bike no more :(