The Light Bulb Advances- Collection LED
Collection LED bulbs to replace CFLs
Collection LED light bulbs fit into a conventional household light bulb socket.
For under $20 you can purchase collection LED light bulbs that fit into a standard home light socket. As tungsten was only recently replaced with CFLs.. the collection LED and eventually single LED bulbs will sweep through the market. As low as 5.7 W for 40W equivalent output.