Hey this is my first grow and I would appreciate some advice. My seedling is starting to have a light color/yellowish edges. It is under a Spiderfarmer 1000 quantum board (100ish wats) and about 20'' from the plant. The temp is around 80 and humidity 40-50. Is this normal?
The soil is fine the light distance is fine the temp is ok, but the humidity is too low for a seedling, and the soil looks very wet, which is what's causing your problem your overwatering.
Soil is a bit too rich. Best not to do any thing at this point about the soil. Just don't add any fertilizer for at lease a couple of weeks.
And yes, pull the lamp up.
Hey, as far as i know, the best distance for the quantum board should be
seedlings & clones : 48-60" (1.2-1.5 m)
vegetative growth: 24 - 48" (0.7 - 1.2 m)
flower: 18-24" (46-60 cm)
Good grow