White Widow AF new grow

There is 4 plants top pic then side pic. The plant labeled C was planted 3/15/16, the rest 3/19/16. 4/11 I transplanted into larger container. Today I started using ph down and added nut (12 8 4). On 24 hour light schedule. In grow lab tent, using 4 CFL 13 watt 2700k spectrum and two 7watt 6500k spectrum. I have lights 2-3 inches from plants. Have internal fan and 2 6" inline fans. Due to outside temp I don’t use the inline fans a lot. The tent is in a building on my property that is not climate controlled. Any thoughts, I’m new and can use help. Thanks.