LED bulbs may very well be the future of of lighting, but unfortunately at the moment the reason why it's not widely adopted is because unlike CFLs (Compact Fluorescent Lamps) and incandescents, they cost way too much to be widely used. Not many people out there would be willing to pay $40-$50 for a single light bulb while CFLs and incandescents can go for $4 and as low as $0.50 respectively.
Ubergizmo, Cheaper LED bulbs coming soon
