I agree alkhall. The ones that are leggy sprouted and didn't have immediate light. I thought they would take a week or more, but those ones were pretty eager and took only a few days. Let them go for a weekend and came back seeing something a lot different.
Luckily the newer sprouts, the ones that had immediate light, are much shorter. Those are the more purpley ones too. I'm just learning as I go here.