8 Suns for 9 days, for one day is spent with none

[vicky_molokh]

Greetings, all!

I'm slowly making up stuff for a fantasy settings, and one of the ideas I had that over the course the 9-day week, each day the world has a different sun rise and set. (The world is flat-ish if it matters.) And one of the ideas was that one of the days doesn't have a sun, i.e. that there is no visible daytime on that weekday. I'm guessing plants would need to compensate with somewhat higher efficiency and storage. But what other consequences I might be missing from such a setup?

If it matters, the other suns provide sufficient light, and are each linked to an elemental/environmental theme:

• Green Plains - Yellow Gentle Sun;
• Frozen Wastes - Pale Cold Sun;
• Mountains - Grey Iron Sun;
• Sea - Blue Rainbringing Sun;
• Jungle - Cyan Windbringing Sun;
• Misty Swamps - Violet Clouded Sun;
• Woodlands - Green Blooming Sun;
• Deserts - Red Scorching Sun;
• Darklands - no sun.

Thanks in advance!