How do you guys get over fear sleeping in the dark

I'm terrified to sleep in the dark I have tried my heart rate accelerates and I turn on the light I can't even use a night light I need a lamp.

Non judgement back story I used to watch horror movie stuff they say brain can play tricks on you well its just scary

And don't judge me I know two adult men who from my friends knowledge they are friends they slept the night required lights on during the night they were terrified to sleep in the dark so I need help from anyone who has conquered this even as a child what did you do to sleep in the dark peacefully