Hello Raja!
In regards to internal lighting, two 4-foot, 8 bulb T5 light fixtures would be perfect. The short side of the fixture would go along the 2.4 meter side of the room and will provide adequate lighting for all of your leafy greens. Another perk of using t5 systems is that you can use them at any angle and it is quick and easy to adjust the height as your plants grow.
When it comes to nutrients, we offer a couple different lines and it would be a matter of personal preference after looking in to each one. If you would like to do automatic dosing, there is a product called the Dosatron which dispenses nutrients after mixing. We do not stock this product normally, but it is something we can definitely special order it for you.
Happy gardening!