inevitably going to bring bugs and other stuff into your house... also, indoor is safe from some things but you'll introduce that risk to them -- like caterpillars, which can be a devastating problem.
you can check regional DLI maps for the appropriate time of year... "Daily light integral"
DLI takes PAR and makes it apples to apples comparison regardless of area of coverage or hours of operation/daylight. it'll be easier to guesstimate a proper starting point for any light supplementation needs.
ambient co2 figure up to ~40 DLI, probably a bit shy of that... now, a "field" crop develops a little differently swimming in the suns rays vs artificial light... so the plant may be trying to constantly re-arrange itself, speifically how chlorophyl develops to handle the differetn types of light... not sure if that is anything to worry about, but the plant reacts to its environment and assimilates.. you are giving 2 environments in regard to light provided. still better than giving too little light, i'm sure. it'll still most likely be a benefit to supplement as needed.
in the end you'll have to do some reading to figure out what your sun in your region/lattitude provides... you'll have to look up your umol/s of your lights / area of coverage and number of hours of supplemental light to calculate how much extra DLI you provide per day...
you'll have to observe and react... plants outside develop some resistence to excess light in some cases.. you may find you can give more in this context than a typical indoor plant can handle... see any light burn, you dial back and make a note of a solid "max" relative to environment. next time will be easier.. still need to observe and react for finer adjustments.