IPhone lockscreen changes when brightness is at lowest?

When my brightness is in lowest, my lockscreen shows like picture on the left. But when i SLIGHTLY increase the brightness. The lockscreen shows like the picture on the right. Is this normal? Please help!

Added (1). it's an iPhone 5.

Added (2). it's an iPhone 5.

Thats trippy shouldnt happen tho unless you messed with the transparency settings