Seedling Question

I just planted 3 AK-48 and 3 bubblicious fems yesyerday.I ordered a germ kit from nirvana but it seemed it was going to be tricky transplanting that small peat pot so I put the seed in the peat pot,put it in a 16 OZ cup with half light warrior and half ocean forest,then watered and covered.The temp in the tent is 77.9 degrees farenheit,DO I need to use my seedling heat mat or not.?They are under my 400 watt MH but it is about 4 feet above them,hoping they all pop.....how long does it usually take germinating in soil also

Also how often should I water until they pop,I am just keeping them moist and in a humidity dome,tho the lid is not air tight

I just used one of those germ kits. I watered the kit first, dropped the seed and kept it covered and dark for a couple days until it popped. Transplanted it to a solo cup today no problem.