The battery or switch or something failed and the light won't charge or light up when plugged in.
The light provided is completely inadequate for the intended use, as a trouble light, because the light is not bright enough.
The flashlight (end light LEDs) are completely inadequate...a small LED tactical (3-5W) flashlight is brighter.
If I had the receipt I would return it.
As it is, maybe they'll exchange it for one that at least works.