Why does light Intensity goes only up to 20?

In the source code of LightComponentBase.h, the Intensity property is annotated with metadata UIMax which is set to 20. Does anybody know why?

Moreover, UnrealEngine editor does not seem to honor this and allows higher intensities. I’ve stumbled upon this using “Remote Control Web Interface” plugin, which actually does honor UIMax metadata and does not allow to go higher than 20 for intensity of lights.

Is this a bug, or does this have a deeper meaning?