Hello people whats a good distance to place 250 watt cfl above seedlings I brought 2 of them got 6 auto strains going now and I wanted to know using biobizz light mix and biobizz products only giving tap water at the moment has the soil has got nutrients in I put them straight in 10litre pots as Well using 4 inch extraction with air vents has intake room size is 120cm L by90cmD by 200 cmH