MFL, WFL, and NSP refer to three types of light beam spread, or the nature of the distribution light produced by a lamp. Deciding between the three types of beam spread will depend upon the type of light spread you need. A wide flood light (WFL) will have a large beam spread, illuminating a larger area. A medium flood light (MFL) has a smaller beam spread than the WFL and the narrow spot (NSP) has among the smallest beam spreads. These three beam spread classifications are important to consider when selecting par cans and par can bulbs for your stage or home lighting.