Jon, BFL is low fat / mod carb/ mod protein as written (the ratios are 40/40/20 i.e. p/c/f ) It can be low calorie, but has a built in free day to compensate. It shouldn't be low calorie though - just as LC shouldn't be low calorie (but often is).

Many of us do BFL but use higher carb LC eating - how to go about this is explained in a sticky at the top of this forum "BFL and LC, tips and hints"

HTH
Nat