7 days in and 7 out of 50 going limp

Whats up guys. first post on this site. i freakin love it ive gained so much info and helped a couple. Im always down to upgrade my setup which is pretty much a 6' completely enclosed reptile hand built cage, bubble reflective and foil tape on inside with 4 seperate doors. thing is seriously sealed and reflective, the left 2 side of the cage is the ''hallway'' which is raise the 400w mh up when they get taller, the top right section is stricly for the aerogarden, and the bottom right is connected and has a 75w mh hitting the jiffy pots. i know it sounds confusing but ill get pics to show exactly my setup .. Anyways im about 7 days from seed in soil mix. i have a 400mh light hangin about 2 feet above my 50 lil girls in the ''hallway'' which are about an inch to 3 inches tall. About 7 or 8 are going limp and the rest are perfectly erect (hehe). Anyone know what could be causing this?? my temps are about 70-80 throughout the day. I mist when the soil looks dry and a little more to the jiffy pots after ive been gone for a few hours. I have a aerogarden too, with purple power and afghooey in it. have the time hooked up and set on 20/4 . they are bushin out real good, i wish my soil ones woudl do this. Any advise helps. thanks guys for the space .

overwatering

i figured just wanted to make sure. so when the top of the soil looks dry what should i do ? get them out of the jiffy pots and into a bigger container or keep em in?. should i cut back on deep watering since probably the lower soil is good to go? im scared itll all dry and dry up the roots . oh this is my first grow, i got iguana juice and flora nova on the way. havent tested ph yet, using brita water for the past day. was using tap but noticed a weak white film on leaves. im usin miracle grow n peri and vermi mix. Any help is appreciated guys , one day ill be able to have the knowledge to help others.thx

can anyone help me with that soil watering question???

i barely misted them last night enough to keep the top of the soil moist in the middle of the night. and still on the 20/4 sched. its still 75 in my cage. and i wake up to about 5 more limping and 7 more pop up under the 75w mh theres no way brita water can cause this. will they perk back up? maybe this happens to a first time grower alot. help please i dont want to lose quality seeds

id say you have hot spots...and keep the soil wet..

make sure you have a gentil breeze blowing on em constantly, tie up droopy seedlings with string and sticks they are mostlikly alright. transplant in a week. burry the stem deep enough were it can support itself