Light fitting wires

[Stevie R]

Please see attached photos of a light fitting which I’m about to fit, obviously there are 3 wires connected to the light one is the earth but the other 2 aren’t identifiable as L or N they are just identical wires I’ve never had a fitting like this before so which would be L & N ?

 

[roys]

What type of light is it?
A lot of the time it doesn’t matter, sometimes it does though.
Is it a new light fitting as the ends look a bit rough and with some rough solder on them.