If you’re still using ugly CFLs or inefficient incandescents in any of your lighting fixtures, Amazon will sell you 16 Philips LED 60W equivalent bulbs for $25 right now, an all-time low, and one of the best LED bulbs prices we’ve ever seen.
Just note that these are daylight bulbs, so they’re probably better suited to areas where you work; kitchens, offices, garages, than places where you want to relax and unwind.