Proper lighting for basement bedroom 12x12ft
Adding more “downlighting” won’t help brighten the room. You’re using “task” lighting when you should be using “General” lighting. 

We use either: 1) switched outlets, or 2) surface mounted ceiling lights. 

1) We hook one-half the electrical outlets to the light switch so that a table lamp or lamp on a nightstand can be plugged into the switch. 

2) A surface mounted light with a glass globe will allow light to shine on the ceiling and walls. It brightens the room. Also if it’s placed near a closet, it will cast light into the closet. 

For larger bedrooms we use a combo of 1) and 2), above. I like lamps next to the bed on a 3-way switch with general light by a sitting area, etc. 

By the way, that is not a “legal” bedroom. The Code is very clear: you must have an egress window (emergency escape window) from every sleeping room. It cannot be more than 44” from the floor and must be a minimum of 5.7 square feet with minimum width and minimum height. Don’t put someone in harms way.