I get an overwhelmingly exhaustive/tired/dizzy/disoriented feeling when I'm in dark settings. In particular say a dark restaurant or lounge. This can be even during the day time.

When there is lots of light i have more energy.

I'm wondering if this is due to the fact I am significantly sleep deprived or that i have a vestibular issue?

Accident: 12 months PCS following severe fall resulting in severe concussion to right temporal region of brain. MRI/CT normal however they were taken 1-2 months after accident. Symptoms: Insomnia, Roaring Tinnitus in right ear only, fatigue, and disorientation/dizziness in dark settings