Plain outlines:

Outline 1px, dotted

Outline 2px, dotted

Outline 3px, dotted

Outline 3px, dashed

Outline 4px, dashed

Outline 5px, dashed

Glow outlines:

Outline width:5px, offset:0px, glow

Outline width:3px, offset:2px, glow

Outline width:1px, offset:4px glow

Outline width:1px, offset:3px, glow, no solid background

Shadow (glow with shift) outlines:

Outline width:5px, offset:0px, glow

Outline width:3px, offset:2px, glow

Outline width:1px, offset:3px glow

Outline width:2px, offset:0px, glow, no solid background

Outlines of list-style-type:tree-line elements:

LTR:

RTL: