There's always the point that landing lights are useful in daylight to show up one's position if in a busy circuit or in air - air photography formating.
I never really worked with Hunters, though photographed Dunsfolds' last T8M ( Sea Harrier FRS1 kit test-platform ) XL 602, and checked with my father who had to build the things ( Camm designed aircraft to fly, but not to be built or maintained easily ) - dad confirms he doesn't recall landing lights on any mark.
Seems a mistake - even disregarding my earlier suggestions of making oneself more visible, there's always the chance of getting caught out and having to land at dusk / dark, though I suspect all the help it would give then would be a quick glance at what one was about to run into !
I suppose the exception would be the FRADU jobs, which carried a bloody great light in the slightly blunted off nose - more for spotting than landing.