THIS EPISODE OF THE ENCYCLOPOD objects series is about the light bulb.FIND OUT:who invented the light bulbhow the light bulb workswhat different types of light bulbs are availablewhich light bulbs are better for the environmentCopyright 2011 Elizabeth Hauke. All Rights Reserved.
THIS EPISODE OF THE ENCYCLOPOD objects series is about the light bulb. FIND OUT: who invented the light bulb how the light bulb works what different types of light bulbs are available which light bulbs are better for the environmentCopyright 2011 Elizabeth Hauke. All Rights Reserved.