gusni -gus-gu'i- gismu

x1 [energy] is light/illumination illuminating x2 from light source x3.

[x3 illuminates/lights x2 with light/illumination x1; x2 is lit/illuminated by illumination x1 from source x3 (= selgu'i for reordered places); light/lamp (= tergu'i)](cf. dirce, manku, solri, carmi, ctino, kantu)

In notes:

carmi
x1 is intense/bright/saturated/brilliant in property (ka) x2 as received/measured by observer x3.
ctino
x1 is a shadow/the shade of object x2, made by light/energy source x3.
dirce
x1 radiates/emits x2 under conditions x3.
kantu
x1 is a quantum/ray/elementary particle/smallest measurable increment of property/activity x2.
manku
x1 is dark/lacking in illumination.
solri
x1 is the sun of home planet x2 (default Earth) of race x3; (adjective:) x1 is solar.
calticprigu'i
p1 is a hologram/holograph on surface p2 or projected from radiation source g3 ; p1 is holographic
ctilytergu'i
x1 is an oil lamp using petroleum-based products, illuminating x2 with light x1.
diclamdu
x1 is an electric lamp of type x2
dictergu'i
g3=d2 is an electric lamp illuminating g2 with light g1.
gusfarborcne
g1=f2=c1 is light/illumination that is refracted by amount/degree c3 from origin/frame of reference f3 by refracting medium c4
guska'u
x1 is a photon.
gusminli
x1 is x2 (default 1) light year(s) by standard x3.
gusnunsla
n1 is Diwali (Deepavali) celebrated by s1 with activities s3
gusybatke
b1 is a light switch which is on b2 and made from material b4 and controlling the light source g3.
gusycai
x1 gleams/shines on to x2, the light source being x3.
gusydicra
d1 extinguishes light g1 illuminating g2, the light source being g3.
malmliselgu'i
ma1=mi1=g2 is ill-lit with light g1 from light source g3.
rastergu'i
x1 is an oil lamp using animal or vegetable products, illuminating x2 with light x1.
lamdu
x1 is a lamp/candle/torch with fuel/power source x2
lanru
x1 is a lantern/flashlight/portable light source illuminating x2, in style/with properties x3
aksarni
x1 is aurora borealis
ro'engu'i
x1 (energy) is X-ray radiation, radiating at x2, from source x3
vanlamigu
x1 is sunlight reflected by a pool of water in the evening
xy zei dirce
d1 radiates X-rays d2 under conditions d3.
xy zei gusni
x1 (energy) is X-ray radiation, radiating at x2, from source x3
xipfne
x1 emits light characteristic of/is of the color that is described by/(as) arising from/associated with the approximately twenty-one centimeter wavelength, hydrogen hyperfine proton/electron spin-flip transition (from parallel to antiparallel configuration, id est: from the higher energy state to the lower energy state), electromagnetic radiation