Daylight vs. Nightfall ~ a possible new trait idea?

[Elexia]

What's so original about an idea that does the same as existing gear, except as a trait...

Vampire cloak
[Body] All Races
Cannot equip headgear DEF: 65
Daytime: Adds "Regen" effect
Nighttime: Adds "Refresh" effect
Lv. 70 DRK

You don't have to sacrifice anything in order to utilize it.