Fact 1: Alight bulb converts electrical energy into light energy when it is turned on. Fact 2: In Denver, traffic signal lights are being converted to the new energy-saving bulbs. Given the two facts above, what converts electrical energy into light energy when it is turned on?

Choose from: (I) Something found in a traffic signal (II) deoxyribonucleic acid (III) Something found in a hand mixer (IV) Something found in a power strip (V) Something found in a hair dryer (VI) polymers of nucleotides (VII) a hemisphere is tilted away from the sun (VIII) an electron microscope
Answer:
(I)