Lighting in my Boxfight Map

Hello,
I’ve been having problems with lighting settings for a while. My boxfight map is currently dark for some players. especially for players who play on standard settings. Can someone help me how I can make a perfect lighting setting so that all players have perfect lighting?

A picture of my friend’s POV with the standard settings

and my POV where it is brighter (150% lighting)

The only thing I’m using right now is Day Sequence Device.