What is the maximum current safe for illuminating a LED?

The maximum safe current for illuminating a standard LED is typically around 20 mA. This value is significant because it represents the upper limit that standard LEDs can generally handle without risking damage or shortened lifespan. While some LEDs can operate at currents higher than this, 20 mA is a common benchmark for many standard LEDs. Operating at or below this current helps ensure reliable performance and avoids excessive heat that can lead to failure or reduced brightness over time.

In practical applications, it's important to also consider the specifications provided by the manufacturer, as there can be variations. However, sticking to 20 mA is a widely accepted practice for most general-purpose LEDs. Other options, such as 10 mA, 15 mA, and 25 mA, either fall below the typical threshold for desired brightness or exceed the safe operating range for most standard LEDs, potentially leading to issues.