Daniel Barlow wrote:

David Hansen writes:

If the report is true then the cyclist had working lights on his
bike, though they may have been dim.

There is presumably some threshold of dimness below which a light
becomes illegal.

Switched off - which is certainly a possibility and would be just as
concordant with the reported facts - would certainly count as that.

Or perhaps there isn't - lighting regulations for
bikes have historically been a bit daft (c.f. illegal LEDs until a few
years ago) and it would not surprise me too much to learn that it's
technically ok to cycle around with dead light batteries.

It is.

But not at night. :-)