What is the typical beam angle of an LED floodlight?
The beam angle of an LED floodlight refers to the angle between two directional lines where the light intensity reaches 50% of its maximum.
Depending on different lighting needs, the beam angles of LED floodlights can be roughly divided into three categories: narrow angle (10°–30°), medium angle (60°–90°), and wide angle (over 120°).
Narrow-angle floodlights, also known as spotlights or spotlights, have highly concentrated light, long illumination distance, and high central light intensity. They are suitable for long-distance lighting, such as illuminating the exterior walls of high-rise buildings, highlighting sculptures or flags, and providing supplemental lighting for stadiums. It's important to note that narrow-angle lights can produce very glaring bright spots at close range and cover a small area.
Medium-angle floodlights are the most versatile type, suitable for floodlighting most small and medium-sized building facades, billboards, and parking lots. They ensure a certain illumination range without sacrificing too much central light intensity.
Wide-angle (also known as ultra-wide-angle) floodlights typically use fisheye or honeycomb lenses, resulting in very uniform light dispersion with almost no obvious beam boundaries. This makes them ideal for large-area, close-range lighting, such as plaza ground lighting, factory workshop interior lighting, and general courtyard lighting.
Furthermore, some high-end floodlights offer replaceable optical lenses or adjustable reflectors, allowing users to manually adjust the beam angle according to site requirements. In practical projects, the optimal beam angle is usually determined using lighting calculation software, taking into account the installation height, the size of the illuminated area, and the required illuminance.
For example, a 100W floodlight installed at a height of 3 meters with a 120° beam angle can illuminate an area of approximately 50 square meters, while a 30° beam angle will only illuminate approximately 8 square meters, but the center brightness will be several times higher.
