John.,

Not being harsh in here however there are few issue that need to be addressed in here.,

Genral lighting circuits it should not be more than 20 amp per circuit.

The THD percenetage it should be on the ballast for most electronic ballast IIRC they are either <20% or 10% one of the two if latter it will be not too bad but former yah you will have issue with netural conductor.

as far for sizing on netural conductor yeah go with #8 if long runs.

I will wait for Steve to see if he have more tibbits to add in here.

Merci,Marc

Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)