I was a little interested myself so I found this site:
http://www.hydroponics.com/light/sun_neut.htm

Economical, versatile multi-purpose lamp
Balanced spectral output
Promotes both flowering and vegetative growth
Long life
Available in 250, 400 or 1000 watt lamps, with choice of universal, horizontal or base-up burning configurations
Homegrown SUNMASTER Neutral Deluxe Grow Lamps emit balanced light similar to a 4000° Kelvin source, imitating the natural white look of sunlight. They are ideal single lamp sources for practically all phases of plant growth.

Homegrown SUNMASTER Neutral Deluxe Grow Lamps are effective in promoting both vegetative growth and flowering. They surpass many other HID sources in PAR watts - the most objective measurement of total light energy available for photosynthesis.

Available in 250 watt, 400 watt or 1,000 watt versions, with a choice of universal, horizontal or base-up burning configurations for optimum performance.

Homegrown SUNMASTER Neutral Deluxe Lamps set new standards in general plant lighting, promoting high levels of photosynthesis without compromise.


You want between 5000-7,500 lumens per square foot so based on 10 x10 that would be 500,000 -750,000 lumens. Seems like 5 of those in a 10 x10 room would be like the krypton sun though. Maybe get a couple of 250 w to spread around the perimeter of the room.

I have the same size area and arange my MH in the center and have 3 HPS around the outside of my actual grow area. Ya have to figure also that if you have good reflective material that helps out QUITE a bit. Good Luck! :thumbsup:

Remember to watch that amperage pull....don't want no fires!