There are four popular types of lightbulbs: incandescent, compact fluorescent (CFL), halogen, and light-emitting diode (LED). Light-Emitting Diode (LED): One of the most energy-efficient lightbulb types, it gives off no heat, contains no mercury, and emits a bright light
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Lightbulbs have several characteristics and many of them are independent on the other one. That means that if you have, just as an example - these are not actual figures, 20 choices of lamp size, 5 choices of type (incandescent, fluorescent, halogen, LED, mercury vapor), 5 choices of light temperature, 10 choices of beam spread, 10 manufacturers and 20 choices of power (wattage) we already have a million different lightbulbs.
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There are four popular types of lightbulbs: incandescent, compact fluorescent (CFL), halogen, and light-emitting diode (LED). Light-Emitting Diode (LED): One of the most energy-efficient lightbulb types, it gives off no heat, contains no mercury, and emits a bright light