"Higlanders light infantry headgear " Topic

What did they wear ?
Caps ? bonnets ?
Lights of 71st are sometimes shown in crested helmets but these are from later period and service in India…

link

Here are some good paintings that should help answer your questions. Of course it depends on what year/campaign too, at least in the kilts vs overalls question.

Nice pictures,
unfortunatelly nothing in the subject.

Then I'm not sure what your question is? Highland lights might have worn a different color feather but that would be about it, except perhaps wings on the coats and black leather equipment.

Those hats pictured are what they wore.

Here is the 84th Light company's webpage

84thregiment.org/Home.html

I know how the Scottish bonnet looked like. I wasn't sure if light bobs wore it.
Guys on your photos use a kind of bonnet (looking a bit different than "regular" one).

Those guys are the 84th, so I would go with the hat pictured in the Troiani paintings for lights in the 42nd, 71st, 74th.

There are recorded/paintings of Highland regiments with cap/helmets for the light company, but I expect these were for formal wear only.

I would have thought the 42nd and 71st would have worn the bonnet in the field, as a mark of their status – although that said, they weren't that fussed about losing the kilt and the broadsword.