Yellowing Leaves on My Seedlings Bottom Leaves

I'm not sure if this is normal or if I'm doing something wrong. Light a tad too high perhaps? Any suggestions?

They look fine to me buddy, Those lower leaves are ones that can fall off sometimes but because the rest of the plant looks good I do not see a problem. Keep a close eye on them for signs of the whole plant having what would be a N def if they are turning yellow. Foliar spray and you will keep them very happy. If those are t5's you can get as close as possible and not hurt them. Nice job so far.

OK, that takes a load of my mind. Thanks for the prompt reply. I appreciate it