seedling lighting

Hey all! I have done a few successful grows with cmh and hps. I decided to have a go with LED and purchased tge Lumatek 300w for veg in 1m x1m tent. Its 28" above seedlings on 40%. Am I way off? Anyway 3 have stretched and 2 are short. All dodgy colour and not looking good. I know its a...

I have 3 day old seedings. I'm a new grower (kinda) i only have led lights. They have the veg/bloom switches. I spray them with a couple squirts of water when they look like they need it. My question is how do I take care of them? Like when do I add nuts, what lighting? Everything lol