As for the electrical part I for a long time to study.
First, the mobile division of the electrical / hydraulic part, has allowed me to achieve greater security against short circuits caused by splash on thorns. I also decided not to put anything on the floor of the cabinet in order to avoid electrical problems in the event of flooding. I have to do it with the cabinet of a cabinet hung on the wing and back to the heavy metal halide ballast, I used a medium (ikea) drilled in order to obtain a good heat dissipation.
But let's get to the real power ...
I used a cabinet with 36 modules ... and yet many seem to believe that they are always too short!
The first line I have taken for use in the control unit which I'll discuss shortly in a dedicated post. The second line is left free for private use of automatic control, the last line is partly free and partly related to the good old and very reliable thermostat. For reasons of cost per hour I did not expect any breaker in the future but I do not exclude the possible addition.