Would you buy a light bulb that uses 85% less energy than incandesecent, is dimmable, produces almost zero heat and has a life of 20 years.
The light bulb is LED or Light Emitting Diodes. This bulb is the future of residential lighting.
LED is now saleable, because they cast a 2750 Kelvin degree light, which is almost identical to halogen.
These lights can also be retrofitted to existing 6" recessed cans.
Have a look: