Too much light or overwatering?

Hey do this is my first time growing and I have 2 plants both around 9-10 days and seem to be growing fine but one is a little light on part of the leaves and the darker one some of the tips are starting to point up a little bit. I’m not to sure if it’s my light being too strong or if I’m over watering. I’m using coco with a little slow release all purpose fertilizer and I’m watering them when the top 1-1 1/2 inch is mostly dry with a tiny amount of moisture left. My light is a spider farmer sf2000 and it’s up about 30 inches and on about 18% power. My temp has been between 73-75f and the humidity has been 60-68%. I’m mainly worried because I accidentally over watered what should have been my 3rd plant within 4 days after sprouting.

They don’t look too bad mate, turn ya light to 40%

And go easy with the watering, a small spray bottle works good for this stage, ya humidity is about right

have u got a fan blowing on them?

are u checking the ph of what your feeding them?

I have a small desk tower fan on the same level as them oscillating, a clip fan blowing around the bottom to middle of the tent, a 6in intake on the bottom and a carbon filter up top. My light is a spider farmer sf2000 led. I’m using a spray bottle and I’m only spraying around the edges enough to seep down a little and a little more around the center and I do that when it’s almost dry about 1- 1 1/2 inches down

Your seedling is stretching for light instead of developing roots. Lose the heat mat, that's for germination, power up to 50% (100w) and lower light to 20 inches, and make sure there is enough air circulation to "wiggle" seedling, which will strengthen stem and roots.

Thanks im gonna adjust the height and power and see how it goes. The heat mat is off i just keep forgetting to take it out