Cool looking fixture. My concern would be with the glare from a bollard like that. Exposed lenses on a path light leads to a lot of glare. Keep the wattage way-low, and try to get some light on the path from another source (downlights from tree/structure, indirect wash lights off a wall, etc) to create layers of light so you don't have to blind anyone just relying on those bollards.
Here's what I cam up with: