There are lots of light sabres, but I've got a P8/PPro2010 version which actually casts light, and a P9/PPro2012 (and later) version which gives smoother illumination than the P8 version.  RDNA free stuff has both of my light sabres, and the P9+ version is in my ShareCG album.

Poser 12, in feet.  

OSes:  Win7Prox64, Win7Ultx64

Silo Pro 2.5.6 64bit, Vue Infinite 2014.7, Genetica 4.0 Studio, UV Mapper Pro, UV Layout Pro, PhotoImpact X3, GIF Animator 5