After doing much research I am starting to buy supplies for my first grow. I'm planning to grow 3-4 plants with 400 watt hps for flower and 400 watt mh for veg. I was also thinking of adding about 80watts of cfl as side lighting. Would it be a bad idea to use different light types? also is this enough light for about 6 sq feet with the number of plants? When all the lights are installed how can I ventilate the system? is a simple fan enough?