Propagation: Help! My Zinnias have sprouted already!, 1 by Jeannie63

Jeannie63 wrote:
Today, during a few non-busy moments at work, I did some more research and realized that I needed to change the way I installed the lights so that I could adjust the distance from the seedlings to the lights so they do not get leggy.

However when I got home and checked on my greenhouse, I discovered that about half the zinnia seeds have already sprouted! This one looks a little leggy to me already!!

Should I be worried about these little guys? The packet said they would germinate in 7 - 14 days, so I figured I had some time to fix my lights.