The luminous brightness of an LED display refers to the luminous intensity per unit area in a given direction, and its unit is cd/m² (candela per square meter). The brightness range of LED displays will vary depending on the occasion and type.
For indoor LED displays, the brightness range is usually recommended to be around 800\~1200cd/m², and it is best not to exceed this range. For indoor full-color displays, the brightness range may be wider, generally around 100~800cd/m².
For outdoor LED displays, due to the need to cope with stronger light and environmental challenges, the brightness range will be higher, usually around 4000\~6000cd/m², and in some cases even need to reach more than 7000cd/m². However, it should be noted that excessive brightness may cause discomfort to the surrounding environment and people, so some places have imposed restrictions on the brightness of outdoor LED displays.
In addition, the brightness of the LED display is also affected by many factors, such as the size of the LED tube core, drive current, ambient temperature, etc. Under the same dot density, the brightness of the LED display depends on the material, packaging form and size of the LED chip used. The larger the chip, the higher the brightness; conversely, the lower the brightness. At the same time, if the voltage or current provided is insufficient, the LED may not reach the predetermined luminous intensity; and the LED used for a long time may lose brightness or even fail completely.
Therefore, when selecting and using an LED display, it is necessary to determine the appropriate brightness range according to specific application scenarios and needs, and perform appropriate adjustments and maintenance to ensure its normal operation and display effect.