I found this interesting ads for TOSHIBA eco bulb.
1890- Matsuda lamp
The Japan's first commercial lamp by TOSHIBA.
1980- Neo-Ball Z Real PRIDE
The fluorescent light bulb that cut power consumption
by 1/5 of regular 60 watts bulb.
2009- E-CORE/LED bulb 4.3W
The LED bulb that gives the same brightness of the 40 watts
light bulb at the power consumption of 4.3 watts.
The life duration of E-CORE is 40,000 hours.
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