Hi, everybody!

I know growing radishes is supposed to be easy, and since I am an amateur gardener, I planted some in a container in my apartment. The problem is, a week after they germinated, they grew really tall and lanky, developing only a small pair of leaves. Any ideas as to what I might be doing wrong? I've supplemented them with a 6500k led bulb, because they don't receive enough sunlight and tend to turn towards the window.

Thanks. Any advice is greatly appreciated.