slow seedling growth

i have 5 lemon og kush fem. its been 12 days since they popped out the dirt, at first it seem like they growing fast for the first week but for the last 4 or 5 days it seems like the growth has slowed down alot. all off them are on their first set of leaves (not counting the cotyledon leaves). when i look at other peoples plants the same age it seems like they are are alot more developed then mine. im using a 135w led and 2 300w equivalent cfl lights and im using mg organic potting soil. can anyone please tell me is this normal or should i be consered.

You should be concerned.

Can you post some pics?

do you have any idea whats causing this

Post pictures.

Overwatering is a classic. Soil possibly too hot (nutes)for seedlings. Too cold temp or too hot. They grow like weed given a somewhat half decent environment.

i cant post any pics right now

More light will help, what kinda lights you using?

135w blaqstar led and 2 300w equivalent cfls. i know cannabis is a very resilient plant so i know it will eventually start rapidly growing i just wanna figure out why is it growing so slow now when most people would already have 2 or 3 sets of leaves by now