Question About Flowering

Sup peeps i am kinda new to growing this is my second CFL grow, now i moved into a bigger box for a bigger plant now i know bigger plant more light lumens ect.. but my question is i got a 2ft wide 5ft tall and 5ft deep, i just realy want to flower 2 max of 3 plants i added up most of the lumens ect to a few calu my space is 10 sq ft wth means its needs 100k lumens to flower the whole box i dont want to. Can i just light it up to like 10k lumens a plant or do i have to do the full 100k lumens for the box just for two plants? plz help

p.s i do have mylar in the box if that helps the plants i want to be like 3-4ft tall.

just focus the light around the plants and itll be fine you dont need to light the whole area. youll need some side lighting it you want them 4 foot tall or youll have a nice top with a bunch of skrawny crap on the other 3/4 of the plant. i would say go 3 or 3.5 ft tops thatll give you about 2 feet of space for light setup and pot space to be safe

i under stand bout side lights ect, i just did no want to run 1000watts for 2 plants

i have the same space mine is a portable closet i use i use 12 cfl 26watts 1750k two on top and arround the side of plants im in my third week and im doing good. also like he said the trick is to get them near the plant without burning them. all the het adds up even for cfl's in our space.