high-power panel lights led needs to work all the time

Of course "thermal runaway" usually happens only with colour sensor feedback systems which do not monitor or manage heat. One simple protection could be a thermal sensor constantly measuring the junction temperature and when it reaches a temperature that is too high the system is shut down. It will go on again when the temperature is considered safe but usually this is not an option because the high-power panel lights led needs to work all the time.

More reliable options are needed and one good option is to use heat spreading material like for example natural graphite. When it is applied to the heating body this material will vastly conduct the heat through its capacity and if it is installed properly it will quickly conduct the heat to the atmosphere leaving the endangered body safe.

The brute force method in which led panels shut down is proofed to be useless in most systems. The thermal management should be the most important aspect of the high-power LEDs technology only seconds away from the colour mixing firmware.