build my own HPLED grow box

as the title states, i am thinking about high power LED's and wiring blue and red LED's in,
im looking for thoughts on number of lumen's for blue and red? about thoughts on distribution of the lights for a 5ft tall by 3ft deep, by 4ft wide, considering up to 5 ft wide?
when completed ill post all my schematics and wiring information, as well as my fix for the ballast as the LED's i want to use need a ballast