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.

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.