Whats happening to my small plants? Light burn ou ...

Hey Henry, I took a look at your little ones. At this stage, it’s highly unlikely to be a calcium deficiency because seedlings that small usually have enough nutrients stored in the seed and the initial soil mix to last at least a week or two. What I’m seeing here looks much more like light stress or a slight environmental shock. While 65w doesn't sound like much, 30cm can actually be quite intense for fresh sprouts depending on the light's PAR output, which explains the slight curling and pale edges. Moving it to 40cm was a smart move to let them breathe. Just make sure you aren't overwatering them either, as heavy soil can mimic nutrient issues by drowning the roots. Keep the humidity high, let that light stay at 40cm for now, and they should green up as they establish. Happy Growing Growmie🌱