When they are ready for the light you can use a "Grow Light"
specially made for plants.
I eat my stuff when it is quarter of an inch he he
However the sprouts for my cat I let continually grow
The light works GREAT
"To dream anything that you want to dream, that is the beauty of the human mind.
To do anything that you want to do, that is the strength of the human will.
To trust yourself, to test your limits, that is the courage to succeed."