400 Watt HPS in a 5x5

hey guys, i have a 5x5 tent, with an aircooled hood, carbon filter, and a 420 CFM fan...

my question is, will a 400 watt be suffice for 4 plants in a 5x5?
im more worried about light coverage, and idk if it'll be enough for a 5x5... any inputs are welcome.. and thanks guys!

A 400W set-up should do well in a 5 x 5 tent.
You are correct to be concerned about light coverage. The wattage your plant receives is the singlest biggest
determinant in size and shape. Your best bet, if possible, is to stagger your finishing times. That way you always have
room in the tent as you always are injecting new small plants. Harvest one plant every 14 days is a good way. At any one time your
tent will have a plant flowering 6 weeks, another at 4 weeks, another at 2 weeks and a fourth just in. Put the older gals on the floor
and the smaller plants standing on an upside down pot to put them closer to the light.

Good luck, BigSteve.