4x4, Soil, LED, Reg+Fem, From Seed!

Day 9 - (water day) Plants are looking pretty good at this point! It's been about 4 days now since their last watering. I thought I might be overwatering a bit, so gave them an extra day to dry up. After another 5 days, Only 1 of the 4 seeds I tried of the Urkle Lemons popped :( crossing my fingers its a girl. The other strains germ'd 100% and all are healthy at this time. The plants are peering over the top of the cups now, so I added some more soil. Cups were originally filled about 3/4, now they're almost full. I thought the plants might be stretching a bit, so I lowered the light from 30 inches to 26. Tested soil runoff, and PH showed 6.5 so that's good? Temps are staying steady, about 70 degrees. Humidity around 50%. No issues that I can see. I'll be adding a fan tomorrow. Stay tuned! Day 10 - noticed some splotchy yellow color and slightly crisped or curled leaves today - pics attached. I lowered the light yesterday to about 26 inches so I am raising it back up and hoping it's just light burn. Also gonna try and increase temps and Humidity to around 75/60 instead of 70/50. Day 11 - added some more pics of the yellowing/crisped leaf. Day 12 - Shiloh Z well on its third set of leaves at this point, leading the pack. Got my new heater today. Temps are now around 78. Humidity around 50. Day 13 - tried popping some more beans a few days ago with 2 more Urkle Lemons, and 2 Ape Tranquilizer from Calyx Bros to get 1 more female added to the grow late. Day 14 - (water day - half serving). Did a slight watering of the plants. Both Ape Tranquilizers have popped in soil, Urkle Lemons still nothing. These Urkle Lemons are the only ones I am growing so far that are brutally hard to germ! Not sure if its me or the beans, but everything else has been a breeze to germ except for the Urkle Lemons.