You can also change individual apps to dark or light mode while keeping the dark dock/menubar.
defaults write com.apple.notificationcenterui NSRequiresAquaSystemAppearance -bool No
defaults write com.apple.reminders NSRequiresAquaSystemAppearance -bool Yes
defaults write com.apple.Notes NSRequiresAquaSystemAppearance -bool Yes
defaults write com.apple.Music NSRequiresAquaSystemAppearance -bool No