Personally, I do it quite a bit differently. 1L pots of Promix soaked through buried an inch deep and kept moist with a few spritz’s from a bottle as needed in the dark in a shower stall that’s probably a little too cold.
•start in a shot glass with tap water for 24 hours
•then paper towel till I see tap root 1/4 inches long at least ( place in ziplock baggie and place in a dark worm place
•then into used or ,starter soil , pro mix ect ( no hot soil )
• spray bottle for watering and place under dome
•place under 100 watts or less
Just my 2cents
Paps
.FC-4800 (480w) Light at 14" from top of dome, at lowest light dim setting
I usually just throw seeds in a wet paper towel, then i put the wet paper towel in a sandwhich sized zip lock bag and then into a drawer or on top of my fridge, i check every 24 hrs and usually in 2 days theyre ready for the dirt. One time i had a 0% germ rate but the seeds were 6 year old dutch seeds
I couldn’t imagine the seeds not sprouting with that set up. I usually try and sprout without direct light then when they surface I put them under light.
Yea I guess with the router underneath for warmth I could keep the light off for the first 24hrs. Should i keep the dome vents completely closed the whole time btw?
@Papalag thanks! Yea i think at the lowest setting it should be equivalent to 100w or less. Not 100% sure but it should be.
I soak for 24 hours no paper towel, I’ve got the same starter dome unit and use seedling starter soil in it, I don’t put it under light until I see action happening. My best guess is the light is getting it to warm inside the humidity dome.
Float the seeds in a glass of water until they shoot out a tail. Then throw them in whatever you grow in (coco, soil, rock wool, etc.) and you’re off. No domes or anything needed. Low light, light on the water (mist/spray the tops), and nothing but water in soil or light light feed for inert stuff.
For what it’s worth, it use the soak in water for 24hrs, then into damp, not soaking wet paper towel, in a zip lock baggy. Stick the baggy in a dark cupboard for a day, or so until it shoots a tap root.
Then plant that into small soil pots, make sure its only 2/3rds full of soil, so if it stretches I can bury the stem with more soil.
Then transplant when it has 3 or 4 sets of leaves.
in my experience if the seeds have strong germ rates like probably every large scale breeder now soaking in water or using paper towels is going have them start to be ready in 10-12 hours either way. maybe it depends on the breeders methods? i dont know anything about that side. i use both methods because i enjoy variety and notice no difference when beans are horny.
i always plant them in plain org soil or pro-mix in 12oz dixie cups, pouring slowly and waiting, repeat til get a tiny bit of run off and put them under a dome in my garage under a tiny work lamp til they pop up. i dont use a heat map i just make sure they are above 70F if indoors, as my garage always is. always been making an indent halfway to my knuckle (at the sub-knuckle?) with my index finger and planting seed tail up, folding wet soil from sides on top lightly.
when the seed pops itll break a chunk of the medium so i just gently tap that into the ground without touching the stem.
should note i see some you guys with huge tails in those paper towels so dont plant those tail up, 1/4 inch sounds about right i dont wait long to plant once it comes out of the seed.
Also sandpaper to score the seeds sometimes. 
