Carrots are a bust.

It's official. You can't grow carrots from carrot tops. Although the greens grew prolifically...

 ...under the ground, there's nary a carrot. Here's what the best one looked like:

...and here's what the worst one looked like. Not pretty.

So, kids, what have we learned? You don't grow carrots from carrot tops.

Also, I think we've learned that the lights are not powerful enough, at least for this application. I don't think more light would've saved the carrots, but I think the greens would be less spindly.

So now it's just down to garlic. Wonder what's going on down there?