you guys are both wrong- let me politely say(not really), that disgruntled your lighting is way underpowered and very inefficient - CFL's are very old technology and you will not get good growth with no room for the roots to grow and poor lighting-The air and humidity are fine in the terrarium-not ideal but will work
Redwood you have great material and get ok growth BUT you don't know as much as you think, though your setup is much better then most. This argument started because you both think your way is best when it's not. JKL actually hit it on the head when he said to get masterpiece lvl ficus you need to live in the tropics. BUT and a big "but" you can get pretty good growth if you have a good setup. I've been growing tree and tropical plants for 15 years and all done indoors and under powerful custom LED fixture(I built)- not the overpriced crappy blue/red ones. Just to show you what I mean here's some proof in the pudding, while somewhat new to ficus I am not new to tree biology and growing in unideal conditions, aka indoors
http://www.bonsainut.com/index.php?threads/large-ficus-score-need-help-with-id.17738/
Red mangroves grown from seed completely indoors under led-7 year old with lots of aerial roots
I also have massive lush vivariums that I'll post pics too if ya want