1) What does L.E.D. stand for? a) light emitting diode. b) one simple incandescent  c) one chip 2) What uses do LEDs have? a) signs b) switches c) decorative lighting d) traffic lights e) they are all true 3) What is the Difference between LED lights and an incandescent light bulb a) LED consumes less electricity b) The bulb consumes a lot of electricity c) a y b are both true 4) what is more efficient? a) incandescent bulb b) Led light c) nanotube lamp 5) What is less efficient? a) incandescent bulb b) Led light c) nanotube lamp

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