Brake/Tail Lights (Is this normal?)

[JunkOSC]

I have a question regarding my taillights. Any input is greatly appreciated.

When I have my lights turned on in the evening, the tail lights are extremely bright. So bright, its hard to tell that the brake lights are even on. There is slight brightness change...but not enough to feel safe driving (braking) in the evening hours. Is this normal for a 12 volt system or do I have a wiring issue? Any suggestions?

Thanks in advance,
Tim
1930 Model A Sedan.