Here is an interesting link you might find helpful when considering lighting for your home and/or office.
"Bring Out the Best With Layered Lighting"
http://realtormag.realtor.org/home-and-design/architecture-coach/article/2012/06/illuminating-options-in-lighting?om_rid=AABY6f&om_mid=_BP4JPyB8jktz2-&om_ntype=BTNMonthly