Linear Fluorescent Lamp

Linear Fluorescent Lamps are the most common lamp in commercial lighting. Over the years this category has expanded dramatically. They are the most common lighting source in office spaces.

The current trend is to move to “T8” size, which is becoming the standard linear fluorescent size replacing the older, but still common ‘T12’. T5 lamps are also becoming common. The ‘T’ number describes the diameter of the tube in 1/8’s of an inch (12/8ths, 8/8ths, etc). All the lamps in this category must be matched by both type AND wattage to a specific ballast to operate properly and meet the lamps life expectancy. In energy conversion retrofits, the most common conversion is from T12 to T8 lamps.  T8 lamps are substantially more energy efficient than T12 lamps.

  Linear Fluorescent Lamps Sizes

Fluorescent Lamp Color

There are multiple color, wattage, brightness and length of life offerings in the more popular lengths (2’, 3’, 4’ and 8’). Color is expressed in two ways; in the older types with a color name (like cool white & warm white), and in the newer types by a Kelvin temperature (like 4100K & 3000K). Pricing will vary depending on the length, wattage and series. Color does not generally affect price. For a further explanation on fluorescent lamp color please visit our blog here.

Learn More About
Compact Fluorescent Lamp Sizes

Plug-in Compact Fluorescent Lamp

Plug-in Compact Fluorescent Lamp have transformed the lighting industry and are common in commercial applications. They are not used as widely in residential applications. Today there are size and wattage options to replace most incandescent applications, including dimming. As with HID and Linear Fluorescent Lamps, most of the lamp types in this category must be matched by both type AND wattage to a specific ballast for proper operation and life. Plug-in Compact Fluorescent Lamps are commonly seen in commercial recessed can lights, sconces and wall packs.

The most popular plug-in’s are separated by wattage, pin count and number of tubes.

Like linear fluorescent’s, there are multiple shades of white in plug-in compact fluorescent’s. Color is expressed by a Kelvin temperature, and most are available in 2700, 3000, 3500 and 4100K. The most common color is 35k. Color typically does not effect price within these four choices.


Screw-in Compact Fluorescent Lamp

Spring lamp or “twist” compact fluorescent lamps are becoming very common for household use as an energy saving replacement for incandescent light bulbs. Originally, these lamps were mainly found in the twist or spring form factor, which many people do not care for. Today however, these lamps come in a variety of form factors and wattages. These include globes, torpedoes, Par’s or A lamp form factors.

They can also come in different color temperatures. The benefit of using compact fluorescent lamps in your home is energy savings and long life. The twist CFL does not dim as well as an incandescent bulb, however, the technology for CFL dimming is improving dramatically. When selecting a CFL, the rule of thumb is to take the existing wattage of the incandescent bulb you are replacing and divide by four. This will give you the equivalent wattage in a CFL - i.e. 100w = 23w CFL.