What kind of medium are you using? Also, how many lumens is that bulb putting out?
Typically you don't need light until you see an actual sprout, but I can tell you're going to need to move that light a LOT closer to the plant than you have it. Like, 2-3 inches away.
If you're just using dirt from outside, don't be too surprised when new shit starts to pop out. Invest in some potting soil, will go a long way.