D-Bot-ness said:
thanks THG....hey iyo, do you think it is possible to get half pound out of one plant wit my space and light.....my goal is to learn how to get a great yeild from one plant instead of many plants.....all help would be great...thanks....im doing a DWC
No, probably not even close. An 8 oz plant would be huge and IMO, there is no way you can do it with a 250W. I personally have never grown a plant indoors that yielded over 5.5 ozs. If you decide to go with just one plant, I would recommend scrogging or LST. Smaller wattage lights lose intensity faster over space. With a 250W, you are going to want to keep your lights close to your canopy, keep your plants smaller and do some training.
However, that being said, I think it is a mistake to just grow one plant at a time. I would recommend a 600W and 4 plants in your space if you want 1/2 lb yields. You are also going to need ventilation regardless of the type of light you use.
If you decide to keep the space and use the 250W, I would make the room smaller. Even if you have the plants directly under the light, the light will disburse throughout your entire space resulting in loss of lumens--you need your space the right size for your light.