Seedlings are 1 week 2 days old. in roots organic and perlite. Just switched to a 600 watt MH yesterday from A 600 watt HPS for past week.20/4, temp is currently 76 and humidity is 53%. currently tying to raise humidity. Lamp is 24" from plants. Air circulation is good with intake and exhaust. Only water given when needed about every other day. Going to check soil ph asap. Any and all thoughts greatly appreciated