Hi Bob,
I would expect a person driving a vehicle to be familiar with it’s operation, including how to operate, among other necessary items, the headlights. She claimed that she didn’t know how to turn them on!

I think it would be beneficial as along with the headlights, the taillights are illuminated assisting those behind her to identify her vehicle. Hazard lights would also help.

Did she really act responsibly? There appeared to still be quite some velocity involved at impact.
Exiting the carriageway ASAP would have been better.

Have a good day