Hi jackmilk and welcome to the forums.
I am new to all this also, ahead of yourself by only a matter of weeks so I'm somewhat hesitant to offer advice and someone more experienced may well step in and override me later.
I can't comment on the plant development but as mistergreen said from my experience if it's going well run with it, if it's not don't panic immediately, have patience and observe for a little while.
When you had your tank near the window the plants were likely getting enough if not too much daylight, now you have moved it away and are more dependant on your artificial lighting you might want to take a look at your choice of bulb. The one you have is 2700k which is warm white and, if I understand things correctly, will not offer your plants the best colour spectrum. I believe colour temperature is more important than lumens (brightness), you want a daylight bulb 6000k or more. I didn't have a lot of choice down here in Tasmania so I didn't even consider lumens when I purchased my 6500k bulb from Woolworths, I think it's 1000 lumens the same as the one you are using, it's a 15w CFL on my 5 gal tank.
Another thing to consider, depending on the lamp you are using, is that you can adjust brightness by altering the position of your lamp whilst colour temperature is fixed. I often use my standard desk lamp to angle the light to darker areas as plants grow and block the path or to raise and lower it depending on the weather we are having, a potentially full time job here in Tasmania
Here are a couple of links describing lumens and Kelvin: Lumens
I'd love to see a couple more photos of your jar giving an overall perspective, I find I learn so much from simply observing how others do things.