Newly sprouted seedlings

Hey there I had a quick question today!
I got 2 seeds about 4 days ago of scarface og I used the paper towel method to germinate them and within two days they grew a tap root! I put them in compost that is home made! I used a pencil eraser to poke holes in the soil then I dropped the seeds in and they broke through today and sprouted today now my question would be... Since today is the first day they sprouted should I right away start putting them on the 18/6 plan for veg or should I wait till the leaves form then put them into the 18/6 plan ? Right now I have them in little pots on a window sill that gets a good amount of light through the day but this is temp!
 
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