Get Arcadia t5 12%. Tube. And the starter unit or ballast as they call them. That's light sorted! The size you said is fine or you could go to the 1150mm size tube which is the bigger one and the size I have fitted myself in my 4x2x2! Next up get the new habistat digital thermostat dimmer. The dearest one! You can run everything on that, ceramic heater or bulb and the uv tube too ....sorted!