Light means ‘brightness, radiant energy, that which makes things visible’, which we can see from the original meaning in Old English applies both to the external light of the Sun and the inner Light of Consciousness, which we need to intelligently manage our business affairs and lives, in general, with full awareness of what we are doing.
Before 830, lēht, lēoht, līht ‘light, daylight; spiritual illumination’, from Proto-Germanic *leukhtam, from PIE root *leuk- ‘light, brightness’.