Is it ok to run 14 gauge wire for lighting off of a chain of 12 gauge outlets on a 20 amp breaker?
Not only is it &quot;technically not code&quot;, it is not to code and could be  dangerous. If you need a 20 amp breaker, then you have to change that wire to 12 AWG.  It might be easier to run a new 20 Amp circuit to the bar and change the lighting circuit to a 15 Amp breaker although 8 outlets is a lot for a 15 Amp breaker. This is the kind of stuff that can kill a sale in the future or be a reason to insurance companies to drop you.