The Light bulb By: Allyson Carter. Changed society, history, and everyday life. replaced fire –torches, candles, and oil and gas lamps The light bulb. - ppt download
The End of Incandescent Light Bulbs Is Coming. Really - CNET
Electric light - Wikipedia
Light bulb Storyboard by 2886ea4d
Energy-Efficient Lightbulbs May Have Dark Side When It Comes To Health : Shots - Health News : NPR
Negative Effects of Compact Fluorescent Light Bulbs (CFLs) on Light-Sensitive People - HubPages
Lighting Comparison: LED vs Incandescent Lighting
The Dark Side of LED Lightbulbs - Scientific American
Artificial Lighting: Harmful impacts of artificial light on your health, ET RealEstate