<http://schema.org/about>
"Unlike incandescent 3-way bulbs that really only have 2 levels of brightness, the 3-way Cree LED boats a trio of brightness levels you can actually see."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/your-home/at-home/blogs/from-cree-a-3-way-led-bulb-that-really-truly-goes-3-ways>