Why does one of my LED flood lights randomly turn on and off?
Over the last couple of years I have installed hundreds of LED fixtures and relamped Flouresents to LED's every failure I have had has been due to a bad driver. I have some drivers totally fail no light, some fail by reducing the output, and others flicker or strobe. I have pulled each failure apart and none of the LED's have failed each time it has been the driver. On the expensive fixtures I have been able to repair the drivers when not potted but if potted I replace the drivers. There could be other causes but it sounds like the drivers are overheating and shutting down.