Meanings of too syrupy in English

The light was too red and too syrupy for my eyes.

Well you wouldn't expect anything too syrupy from the author of The Butcher Boy, would you?

The imprimatur of a careful and calculated company like Coca-Cola is sweet, but investors also shouldn't get too syrupy about it.

In Flight is a guitar-charged paean to the pleasures of fleeing, while Sugar Free is a glissando-laced love song which avoids getting too syrupy.