LPD has no direct relationship with how much light the fixtures
provide. Good lighting design focuses on footcandle (fc) levels on the
work surface (30” above finished floor, in the case of an office). A
typical office design has light levels of 30–50 fc. Contrast and
ceiling and wall brightness should also be considered part of good
lighting design as they can have a significant impact on the actual and
perceived light levels in the space.