They are searching for light. They will get leggy if you do not have the light on. When I germinate I just leave the light on my regular veg schedule to help keep my temps optimal. You do not need to cover the seed to keep the humidity. I have covered mine with the cup a soaked the seeds in before, but that's about critter control me being super paranoid about a mouse coming along to dig up the seed. I have had critters dig my seeds in my garden i soweed the day before for a snack. pretty unliky indoors though. especially with a sealed tent. I'm watching you
@m0use 😼