Why is this? The seeds (lettuce, light sensitive) aren't meant to germinate.. I set the seeds up in a dim room, but there was some light cuz I can't work in total darkness. Could this be why? I exposed the seeds to far-red light (using a lamp, while the petri dishes had blue and red filter around them) for 1 minute then I covered them up and left them for 4 days. After I checked them, they ALL germinated :/ What should I do to make this not happen?
... and the ones that won't