That first plant was grown in a coco / perlite mix feeding the Nutriplex line from GT Hydro (I used my own feed as the one given by GT Hydro was very weak)
As for the customs part, it was very easy actually the guys I went through actually generate 2 invoices for you.
One with a high amount and one with a lower amount (like $99) for customs purposes, this allows you to send the goods through customs without payin any additional customs duties, a bit naughty but stuff Mr President and all his corrupt members.
3500k I use from start to finish in the grow, the spectrum in the 3500k is perfect I feel for both veg and flower, sure you could do the 6500k if you really want, but I dont see the need.
This was my tent as of yesterday.