Awesome growmie check out my diary I just dropped my fastbuds green crack auto a couple nights ago...I've seen where someone got over a half pound off this plant. Also if you hop over to LegacyMarketFarm that's the home base in Canada we will be posting lots of tutorials and how tos' by the owner/master grower Andrew! We also have product giveaways coming up in the near future as well!!!
I don't have any experience growing with HID lights but 400W sounds like a lot for such a young plant. The best thing you can do is to invest in a PAR meter and measure your light. Unfortunately, PAR meters aren't cheap but it removes all guesswork with your light :)
BTW, what happened to the other girls? I thought you were planning on growing four plants.
This is my first time growing cannabis and I'm really excited to share my grow diary with the community. Check in with me to see how I'm doin, I'd love support.
Thanks for looking