businesswoman with light bulb instead of head shaking hands with mature businessman - incandescent bulb 個照片及圖片檔
Window display of incandescent light bulbs is seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California. California...
Display of compact flourescent light bulbs is seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California. California...電燈泡
Shelf stocked with compact flourescent light bulbs is seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California....
Shelf stocked with compact flourescent light bulbs is seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California....
Boxes of incandescent light bulbs are seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California. California State...
Shelf stocked with incandescent light bulbs is seen at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California. California...電燈泡, 美國
Worker at the City Lights Light Bulb Store stocks shelves with incandescent light bulbs January 31, 2007 in San Francisco, California. California...美國, 電燈泡
Compact flourescent light bulb is seen on display at the Pacific Gas and Electric energy center January 31, 2007 in San Francisco, California....
Man walks by a window display of incandescent light bulbs at the City Lights Light Bulb Store January 31, 2007 in San Francisco, California....
Worker at the City Lights Light Bulb Store holds a traditional incandescent light bulb and an energy efficient compact flourescent bulb January 31,...電燈泡
Display of incandescent light bulbs is seen at the Pacific Gas and Electric energy center January 31, 2007 in San Francisco, California. California...
Joseph Wilson Swan, British physicist and chemist, demonstrating electromagnetism, 1889. Swan was the inventor of bromide paper for photography and...
The American inventor Thomas Edison who patented the first incandescent lamp in 1879 shows examples of an early and a later light bulb to the...湯瑪斯·愛迪生, 電燈泡
