Want a light that will outlast the century and illuminate your children's homework from kindergarten through high school? Two small Silicon Valley companies unveiled an electronic bulb that uses radio waves to produce 20,000 hours of light, or about 14 years of average use. Intersource Technologies Inc. and Diablo Research Corp. said their new E-Lamp, which fits standard sockets and uses 75% less juice than ordinary bulbs, will cost from $10 for residential use to $20 for commercial applications when the bulbs become available next year.
Intersource estimates that a single E-Lamp could save homeowners anywhere from $50 to $100 in...
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