This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 韑 is uncertain. It visually combines 光 (light) and 韋 (tanned leather), but the original meaning and component function are unclear.
The outer shape 光 suggests light, while the inner 韋 suggests leather. Imagine light shining through thin leather, but the overall meaning remains obscure.
For イ, picture a single beam of light (イ as in 一, one) passing through the leather: イ -> イ, a faint glow.