analysis of led short-circuit
There are some situation for led short-circuit.
overheating: most led damage is mainly caused by heat. short-time lasting overheating resulted from continuous heat.
* instantaneous big current: the led short-circuit at the starting instant of input big current might be seriously jeopardize its service life.
* In other case of led breakdown , then forming short-circuit, final the gold wire of led blew out and formed circuit breaker.
Let’s illustrate this test with Oscilloscope picture：

led circuit breaker before short-circuit

led short circuit in direct

led circuit breaker in direct

led short –circuit before circuit breaker