thats actually a good choice. use your cfls onr your seedling and when you use 24 hrs of light. now most people put 4 plants under 1 1000watt bulb coming to 250wats a plant to get a good grow so 800 is enough for 3. now i would recomend veging them for a couple weeks with 18hrs off light under the hps and you will be very happy with how fast they will grow.... then when they reached the height you want prolly 12 inches the you give them only 12 hrs of light and you will have massive colas