A few answers for you...often fluctuating temperatures will help in germination, as in lower at night than daytime (exceptions might be tropicals). I will often place the pots of seeds that I know are going to take many months to germinate outside on my deck...tucked discreetly among pots containing plants so that I remember to water them.

You can top your seed pots with grit over those seeds that will take a few to many months to germinate, it will discourage moss and algae from forming. Chick grit, horticultural grit, or even fine aquarium gravel from the pet store.

Your seed pots don't need to be under lights until germination begins.

The advantage of the grit is it dries between watering at least on top which is where the algae grows. This greatly helps eliminate algae growth. The soil under the grit remains moist and in most cases those seeds that require months to germinate will survive. Al