the guys will be able to help you more the greater the amount of info you give them., and pics are invaluable.
what medium are you growing in?
what are the temp and humidity levels?
are you feeding nutes?
distance of plant from light?
what strain is it?
are you using HPS or MH bulb?
have you had any previous problems?
etc..
the more info the more accurate the answers will be.
get rid of that clear container for christ sake light is bad for roots thats why god made it so they were underground.. that would be the first thing i did before i got frustrated. the more you put in to your garden the better it will get. sound like a first time grower who is too anxious already. If your already this frustrated be prepared cause life is a rollercoaster buddy