These also splatter light everywhere, some getting where needed but most is wasted. They also create lots of glare. Well shielded wall packs can be excellent light sources, but one must be sure of what one is buying. Some wall packs have good light control, many nearly none. Poorly designed or installed flood lights.
Flood lights can be good, if they have good light control.
But they must be well-designed and installed to take advantage of their pluses. We have all seen many examples of such bad lighting at night. A lack of color rendering is not a disadvantage for most security lighting. Visibility is excellent with LPS lighting. Well-controlled and installed flood lights or spot lights.