i would go with 2 i think the extra lights will help. there are alotta people who seem to know how to get alotta bud with alil light check out some of those grows on here if u havent. gud luck. let me know if i can help further..
i took a look at ur grow box and its nice but im no pc grow master by far. the only suggestions i could give is sometime foil creates hotspots so maybe mylar or somethin like that would be better and ive only tried to use standard house lights once and that didnt las long because of heat. have u tried cfl?