ok so here is a quick look at my room, also i currently own a 430 watt son agro philips hps. now where is the best place to place this light ? and how many other lights and where should i put them to ensure i get the proper light
You have lots of room. How about 3 growing areas, one where it says Flowering Room, one in the area next to the furnace and below the hot water tank, and one in the 6x4 space between the veg room and the drying room? If you are just using a 400, you can put it in any of those spaces. How many lights and where to put them depends on how many plants you want to grow and whether you are using soil or hydro.