Stringy seedling (need help)

My beans sprouted.
They are developing there first set of leaves. They are awful stringy and gangly looking and even swooped over. I tied them to a small stick to keep them upright.
They where in the basement about 10 inches below a double bulb
flouro shop light(on 24 hrs).
I'm not sure if i didn't plant the seed deep enough in the cup or they are stretching for light?
What do you think?
The past 2 days I have them outside in the sun and then move them back inside under the flouro at night.
I am planning on moving them to there permanent outdoor spot in the early may.