Improve Brightness in LED Multiplex
With those LEDs you can make a no brand cheap Chinese LED device that may work for long enough that you can sell it. This is why we pay extra for quality and documentation.



Figure 1. A typical datasheet will give (1) the forward (continuous) current, (2) the peak current and (3) the peak current maximum pulse width. Source: Cree C503B datasheet.

In the Cree C503B, above, the peak current maximum pulse is 100 &mu;s per 1 ms.

There's a little more in (my) LED rated current.