Good lights for a small grow box?

Plusrite Brand 400W Clear Universal Burning Position Metal Halide ED-37 Lamp with Mogul Base, 4000K Cool White Color, and CRI=65. (diameter 4 5/8", length 11 1/2"). Metal Halide Ballast (ANSI Code M59)

25,000 Lumens
Color Temp. 4000K
Finish: Cool White


How many of these would i want for a Small grow box?
3ft x 3ft
OR
4ft x 4ft

Rough est. figure 50 watts per plant. figure the amount you want to grow, then aply the correct wattage in the space.
Ps. make sure the space you use allows enough head room and room for ventalation and light/s and a filter if you run one.

sin semilla said:

Rough est. figure 50 watts per plant. figure the amount you want to grow, then aply the correct wattage in the space.
Ps. make sure the space you use allows enough head room and room for ventalation and light/s and a filter if you run one.

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Does this go for CFL's also?