Light bulbs, as you may recall, have become a perennial excuse for certain federal legislators to whip up the conservative base, by railing again new federal energy efficiency standards.
Relamping projects have been an easy way to score energy efficiency gains in buildings since the 1990’s. Inefficient incandescent light bulbs have given way to fluorescent tubes, compact fluorescent and now LED technology.
Within these stages of development each form of lighting have seen their own evolution. The driving forces for these increases in lighting efficiency are economic starting back with the 1970’s energy crunch.
Taken from a blog on CFL development & history:
“In 1973-74 the oil crisis took place and lamp companies needed to reduce wattage in their linear (tube) lamps to compensate. Many people had four bulb fixtures and were removing two bulbs, to save energy, therefore dropping sales by half. This forced lamp companies to create energy efficient solution.
Ed worked on creating lamp with reduced wattage by adding krypton and a conductive tin coating inside. This helped lower the wattage from 40 to 35 watts but he wanted to get down to 30 watts. He continued to work and finally the wattage went from 35 to 34 and eventually 32 watts!”
See on theenergycollective.com