new grower needing a bit of help

Ok so I germinated my 9 seeds ( 3x white rhino, 3x master kush, 3x chocolate chunk) after planting the seeds in the soil I did not put it under a light for about 18-20 hours. Will this affect me?

Thanks for the help

If u wish to follow my grow journal here's the link: http://forum.grasscity.com/indoor-m...st-grow-1000w-tent-grow-multiple-strains.html