fagytergu'i lujvo

x1=g3 is a torch illuminating g2 with fuel x3=f2 reacting with oxidizer x4=f3 (default air/oxygen).

Cf. dictergu'i, laktergu'i.

In notes:

ctilytergu'i
x1 is an oil lamp using petroleum-based products, illuminating x2 with light x1.
dictergu'i
g3=d2 is an electric lamp illuminating g2 with light g1.
laktergu'i
g3=l1 is a candle/wax light with wax source l2.
rastergu'i
x1 is an oil lamp using animal or vegetable products, illuminating x2 with light x1.