Definition of rim lighting in English:

rim lighting

noun

  • (Originally) the placing of a light source behind the dial of an instrument in an aircraft cockpit in such a way that light emerges around the rim, thus enabling the instrument to be read at night; (later chiefly Photography and Film) backlighting used to create the appearance of a halo of light in a similar way.

Origin

1930s; earliest use found in Aircraft Year Book.