[AlittleSalt]

Thank you Luigiwu and Worth. Potting Mix it is.

Elongated growth. Is that the same thing as what I've been reading about seedlings being leggy?

I'm adding 5 pics. The first two are with both light fixtures on and no photo editing. They are 4' lights with four florescent 40W tubes/bulbs. The last three pictures are with one of the light fixtures off. I also photo edited out light so the plants could be seen better.

In the 4th picture, the tall plants in the center are Shi-Shi-To peppers. They are about 2.75" tall. I know I need to start thinning each cell and small pot down to one plant each. I planted two seeds in each, and most of them have two seedlings coming up. Should I wait to thin them out until they start producing more leaves - or go ahead and thin them out today?

Worth, the rest of your advice is spot-on with how I plan on caring for these tomatoes and peppers. I've experience plants that I didn't cut the lower branches and that just adds headaches.