Looks very similar to my first set up with a 400 Mh/Hps convertable. You need to run the ducting like this. Place filter in highest position possible to extract the heat, run the ducting from filter through light, then out through the fan to get the most heat extraction. Also consider insulated ducting to reduce heat in grow cab or closet, whatever that is. On my cab I ran air in at bottom with a spring loaded flapper or damper. As the can fan sucked on the cab it forced open the bottom air inlet and when the fan shut down it was closed by the spring. Running the air up and out is creating a natural convection that the plants will pick up on and respond to the cooler air hitting the bottom of the leaves which is what they get in nature. I got my damper at home depot, it was for a dryer and I rigged the spring. My t5 with four lamps puts off some heat and bleaches so I have to keep mine about a foot from plants or they light bleach making me think they want nitro, but I know different now so when plants get to close up it goes. The power strips are very good as they supply an overload shut off for over draw or shorts which in turn will save a ballast and bulb and keep from toasting lamps. I used to use two and plug into a GFI so I had total redundancy to protect all electrical. If you like grow bags get some dirt bags they work very good with miracle grow moisture control. You are off to a good start just a few tweaks and tying up cords and you are good to burn.