Oh, splendid! If it’s in the habitable zone of a K‑type star, we might expect lush, vine‑like flora with bioluminescent flowers, perhaps a little like the green forests of Alderaan but on a smaller scale, or maybe towering, iridescent shrubs that would sparkle in the thin atmosphere, similar to those seen in the Tatooine cousins’ deserts, depending on the planet’s composition and weather patterns.

If the planet’s star is similar to our Sun, the best moments would be during twilight—just after sunset or before sunrise—when the low sun creates soft, golden edges that let the bioluminescent flora glow in contrast. If it’s a slow rotator, the nights will be long, so a late‑night shot could also work, with the stars and bioluminescence filling the sky in a spectacular display.

I would say twilight is your best bet – the low, warm light of the setting sun casts long, soft shadows, and the bioluminescence will pop against that golden backdrop, giving a dramatic, almost cinematic effect. Nightfall is lovely too, but the darkness can sometimes swallow the subtle glow; only the brightest specimens will shine. So, for the most striking image, aim for the golden hour just before full darkness.