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It may take 3 tons just to cool the building during hot sunny day, sans grow. Many variables in play.

Depends on manual J calcs, ambient values.

You just did talk to an electrician. ;) Your tonnage calcs are underrated imo. Make sure your AC has a freeze kit. ;)

138 amps at 80% (leg to leg) Assuming AC and smalls will comprise 40% leaves 83 amps @208v for lighting. About 17kW of lighting

Most likely your best option is to run lighting and hvac loads leg to leg at 208v.

Max amps thru neutral using a 15% rated neutral.

Often 3 phase is setup to handle a bunch of large motor loads or IT loads. The neutral is provided for lighting and 15% tends to be a number. So 100 x 3 x 0.15 x 0.8 would be my bet. EDIT Forgot leg to neuteal PF of cosine (30), not really an issue if derated neutral though.

Note 80% is where mains start tripping

Depends. Leg to neutral or leg to leg? Leg to leg its 100 x sqrt of 3 Leg to neutral it's 100 x 3 but most 3 phase transformers only support fraction of their kva through neutral. You need to know what the neutral on the transformer is rated for if running 120v its the limitation.

Too much nitrogen in later flowering.

I'm paying 60 cents on the dollar. J/k

Rottweilers, ballbats, bear mace and cattle prods. Bow & arrow is a bit cumbersome imho.

You sir, have no clue. ;) ignorance being bliss, you must not require drugs of any sort.

Take the # after the T and multiply by 1/8" to get tube diameter.

T-2 is the compact fluorescent style 1/4" tube.

Dabs

MSDS indicates "may cause target organ failure" I suppose if adequately purged this isn't an issue.

Worry about managing heat not lumens.

Garbage In Garbage Out. Whats the quality of the source material?

Early harvest smells good when taken down but smells more like hay or lawn clippings as it dries.