For a glow effect, try:
c=0.05, p=4.5, THREE.FrontSide (sphere) or
c=0.2, p=1.4, THREE.FrontSide (cube)
For a halo effect, try:
c=0.6, p=6, THREE.BackSide
For a shell effect, try:
c=1, p=2, THREE.FrontSide
(effects work best on spheres)

This three.js demo is part of a collection at http://stemkoski.github.io/Three.js/