Yessir.. those look stretched to me, but I don't think it's anywhere near too late for this to be a GREAT grow. Now.. I'm no expert yet, but at 19 days old, my Top44 isn't 6" tall yet. It is a REALLY healthy plant, too. I made a couple of newbie blunders with it already (that's why I went w/ it!) on a transplant and let it dry a bit too much. I also stunted both of mine a bit by having them too close to the light for a bit.
SO.. here's my advice:
1. Fill your pots up to nearly the rim to bury those stems a little bit. Roots will grow out of it. Yours and mine likely came from the same lineage (Nirvana also!), so they should grow nearly the same. What dirt do you have, by the way?
2. Get a SMALL thermometer and put it IN the planter with the plant. You need to know how hot the plant is, more than anything else.
3. Use CD cases or something to get your plants as close to the CFL's as possible. As a frame of reference, my plants did not burn or even singe a little bit when the leaves were about 2 inches from my CFL's. Make sure they're only close enough to get them to about 80-85 degrees. They will slow down that vertical growth FAST.
A tip on the Top44, too.. they smell during veg. If you are vegging your plants at all, don't be surprised if you smell these guys early. Mine reeks, at this point.
Regarding pH, tap water varies, with regards to "ideal". Ideal is 6.5. My tapwater is about 7.4, so I began adding a touch of vinegar to my water jug when I fill it. Also.. spring water turned my plants yellow, so I decided to just use the water from my tap, plus vinegar, plus a drip of molasses. The day I changed my ph was the day my plants actually started growing again after their stunting from light. Bottom line.. you need to measure your ph.
Also.. like "water is not water", "soil is not soil". Some soils will burn the hell out of these plants.. even kill them. I used Miracle Grow Organic, which has been FABULOUS. It is full of big chunks of shit, too.. so that my soil stays aerated. If your soil is too tightly packed, your roots can have a hard time spreading or getting enough oxygen.
Yes, these plants can grow anywhere.. depending on strain. Ruderalis strains (lowryder, etc.) even grow in Nunavut outdoors!! Top44 is VERY hardy and yes, will rebound from rookie mistakes. Understand that the more you optimize your grow, the more you learn, the better strains you can manage over time.
Also.. wtf are you doing ordering from NL? Your country has awesome seed banks, eh? Hell.. there's even one in Barrie!