Redly

Beams, rods, and lances of energy flamed and flared; planes and pencils cut, slashed, and stabbed; defensive screens glowed redly or flashed suddenly into intensely brilliant, coruscating incandescence.

[…]you can sleep under it beneath the stars which shine so redly on the desert world of Kakrafoon […]

But there are still two alternative interpretations of such expressions as "sensing red" or "sensing redly." (i) We might define "sensing redly" in such a way that our definiens makes explicit reference to things that are red.