I've grown so weary of the very poor quality of "herbs" to be found around my area that I decided to build a little self-contained grow-cabinet and grow my own.
Being a professional cabinet-maker, I realized that I would never live down a sloppily-built cabinet. My friends would point and ridicule me!
I decided to go for a classic pyramid-shape partly due to the shape of the inside being ideal for focusing the light beams from the HID's directly downward to the plants where it's needed; but mostly because I can, he he. Perhaps some of the "magical power" of the pyramid configuration will have some unexpected and positive outcome!
The pyramid is divided into two separate entities that are easily divided for ease of service to lamps or fans. The lower portion of the hood holds a 250Watt MH and a 250Watt HPS, each with a hole directly above it to ensure a constant convection airflow, which is aided by the suction from the fan above it in a separate section. The inside is covered with ceiling isulation which is very shiny yet somewhat uneven, giving a nicely diffused reflexion. The upper section holds a fan to extract the heat from the lamps. The holes between the two upper sections are offset and painted matt-black to prevent light from spilling out from the fan-hole.
The mitre-cuts on each separate section allows them to fit into each other naturally, without any additional brackets. Black draught-excluding tape is used to prevent light leaks.
The two upper hood sections are divided from the main grow cabinet by a piece of tempered glass. This feels completely cool to the touch underneath and completely eliminates any possibility of plants being burned if they suddenly grow too much, while I am unavailable to tend to them. (I am looking forward to try and see if I can somehow train some plants with the aid of the glass pane, similar to "scrogging)".
The rear of the cabinet features a frosted glass panel with a removable cover to allow some of our lovely South African sun to do it's thing during day-time. (No point in wasting millions of watts of free energy I figured). This window faces a large South-facing window (I'm in the Southern-hemisphere).
On the sides are separate air intakes for cooling the light-hood and for ventilating the plants. The fan that extracts the air from the grow box (where it is relatively cool) exhausts it's air flowing over and around the ballast, igniter and transformer, keeping them cool as an added benefit.
I am currently growing some "Swazi" from seeds (a nearly pure Sativa as far as I can ascertain) I realize it is far from ideal for cabinet-growing, but I am learning to grow and figure that training on a difficult strain, might let me learn that much more.
All comments and suggestions are welcomed please.