I've just gone and bought 2 new high output CFL 125W to suppliment the 250W CFL i already have above.

where is the best place to hang the lights? below canopy, to the sides of the plants or in the middle.

My set up is shown in my first post. i have 4 plants in a 2 x 2 configuration.

Any advice will be much apprciated.

bigc79