That piece of glass you have, since it is at an angle, is reflecting a LOT of useable light at a wall. You should have glass like that parallel with the bulb if you're going to do that. And I'd bet you don't even need it to be there.
You can transplant whenever you want. Just be careful. It's going to be very hard with that folgers can.
Also, it has a severe nitrogen deficency in the above pictures, hope you worked that out. The key to a successful harvest is having many many healthy green leaves before going into flower. Sucks, each and every one of those dead yellow leaves was a fat chunk of your yield.
Good luck.