Well this seems like a Fun journal!...first just like to say welcome to ...what kind of soil are you using?...for over 3 weeks old, they do seem smallish although still healthy...I have always used CFL's for seedlings...a few 23 watt 5000k or 6500k(usually says on the bulb base) from the dollar store would be enuff to light up your babies lives...and save Ya' some money too...as for nutes...you could use miraclegro(BLASPHEMY!...lolool)...its easily sourced and really just the same as most "designer nutes" IMHO...just not any fancy names...using a diluted mix(1/4 to 1/2) has worked for me before I tried the fancy stuff...if you must...seems General Hydroponics on the Zon' offers the best prices...same for temp/hygrometers...a couple clip on fans from Wally World will give you some air circulation...as mentioned... open bottom/top vents helps...a healthy environment=healthy plants...anyways...hoping your girlz get some legs and start performing...cheerz...h00k...