Tony, it appears to me that the 12 inch riser that comes with the lamp is the same as the individual 12 inch riser that is available separately, so, yes, you can extend the light to whatever height you desire with additional riser length. Bob
Hey Tony, Bob is correct - the bundle itself does include the normal 12" solid brass riser as a necessary component with the solar light housing. You could add another riser to this assembly, but the design is more so tested & optimized for use with the 12" riser. Given that this solar path light is designed for subtle output (~200 lumens), adding additional height could slightly diminish the amount/strength of illumination you receive on the ground below. Doable, but not exactly recommended.