scintillant

As adjectives the difference between sparkling and scintillant

is that sparkling is of an object, reflecting light as if giving off tiny sparks while scintillant is producing sparks.

As a verb sparkling

is present participle of lang=en.

As a noun sparkling

is act or appearance of something that sparkles; a sparkle; a gleam.

As adjectives the difference between scintillant and incandescent

is that scintillant is producing sparks while incandescent is emitting light as a result of being heated.

As a noun incandescent is

an lamp or bulb.