This mod is an implementation of held item illumination that produces a certain level of light depending on the luminescence of the player's held item.
Since it checks node definitions for light_source values, no configuration should be needed.
Also, the internal code has been fine-tuned to reduce the amount of visual bugs, mainly by being as thorough as possible when trying to find a suitable position to emit light from.
Simple mod but great game changer.
This mod provides great quality of life improvements to Minetest.