Compact Flourescent (the spiral bulbs) : A smaller version of the long straight flourescent lights most frequently used in supermarkets, they use about half the electricity to produce the same amount of light as an incandescent. Unfortunately they contain mercury and in a perfect world would be thrown out at a hazardous waste dump.
L.E.D (Light emitting Diode): An old technology redone is our modern age, they can use 4 watts of electricity to produce the same amount of light as an incandescent 60 watt. They also last five times as long as anything else. They’re also good for LED outdoor lighting!