I believe dill is one of the ones that needs light to germinate - or germinates better if uncovered.
I tried starting them for micros last year, then realized it was not going to be dense enough for that kind of a cut, so I potted them into sandpails (deep for their roots) and we had some nicely dense foot high dill for cutting for awhile. That did fine under lights. The micros I seeded without soil on top and iirc I alternated them warm/dark and daylight. The dill that did sprout were faster than cilantro or parsely - but that may be freshness of seed. All of them require patience, even if fresh! I forget which ones prefer light vs darkness, but all of them got misted twice a day - i think they have germination inhibitors in the seed coats and so the idea, to mist em hard, and soak it off them eventually...