You are presented with the question "What converts electrical energy into light energy when it is turned on?" and the following answer choices: 
- Something found in a traffic signal
 - deoxyribonucleic acid
 - Something found in a hand mixer
 - Something found in a power strip
 - Something found in a hair dryer
 - polymers of nucleotides
 - a hemisphere is tilted away from the sun
 - an electron microscope

Now knowing that alight bulb converts electrical energy into light energy when it is turned on and in Denver, traffic signal lights are being converted to the new energy-saving bulbs, choose the best answer.


 

 Something found in a traffic signal        