I am planning on starting a grow in the near future. I have a 4'X4'x6' box i will be growing in and was wondering if this is enough space to grow two plants in and if a 250watt hps light will be enough for the plants?
The space is fine, the light is fine for two plants but is a little skimpy for that 16 sq ft footprint. Keep the plants close in under the light, and you might also want to consider some sort of reflector panels around the plants to hem in the lighted area a bit.