The one and only surviving plant, seems quite healthy, but there is one small light spot there, not sure why? maybe calcium deficiency or too close to the lights
Why my seeds didn't germinate? I tried to soak it overnight and straight putting it to jiffy peats.
maybe because of, I was using tap water, or too deep digging the jiffy peats?
Peat can sometimes be acidic. And it sounds like way too much water. Try the 24hr soaking in water and then the paper towel method for 2-3 days. Submerged in soil, tap root down. Thousand of videos on YouTube! Good luck!