Light bulbs of all shapes and sizes come in a variety of different technologies. For example, there are LED A19 bulbs, CFL A19 bulbs, incandescent A19 bulbs, etc. Some technologies are more energy-efficient than others, and some are better suited for certain purposes. The five main types of lighting technology are incandescent, fluorescent, LED, halogen, and HID.
Incandescent: Incandescent lights are your inexpensive, tried-and-true light sources. However, they are very energy-inefficient compared to newer fluorescent or LED lights, and as you may have noticed, they don’t last very long. Chances are the light bulb that burned out was an incandescent. Perhaps the most popular incandescent light bulb is a 60-watt bulb with a medium base, which is typically used in a ceiling fan or lamp.
Fluorescent: Fluorescent lights are often made in a tube shape and used in commercial ceiling fixtures. Sometimes, fluorescent tubes are also used residentially in kitchens or garages. Since fluorescent lights are much more energy-efficient than incandescent lights, compact-fluorescent lights (the swirly light bulbs) have been made to replace them. Fluorescent lights come in special plug-in styles too, which are usually used commercially or outdoors.
LED: LED lights are the most advanced lighting options on the market. They are made to be energy-efficient replacements for bulbs used in residential, commercial, outdoor, and even industrial applications. When you figure out the bulb and base type you need, chances are it’s available in an LED style, too.
Halogen: Halogen lights are most popular in landscape lighting or automotive headlights. They produce bright, far-reaching light, and they also tend to emit a lot of heat. They are often used as outdoor reflector bulbs or infrared lights in heat lamps.
HID: HID (high-intensity discharge) lights emit even brighter, further-reaching light than halogens and are usually used in industrial or specialty applications such as outdoor street lighting, parking garages, stadiums, warehouses, and automotive headlights.
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