how many lumens of light per square foot?
For the average space of 250 square feet, you'll need roughly 5,000 lumens as your primary light source (20 lumens x 250 square feet). In your dining room, you'll want about 30 lumens per square foot on your dining table (to see, not examine, food), so if your table is 6 x 3 feet, that's 540 lumens.