Fluorescent Light Bulb Base Types

Intermediate base code.

Fluorescent light bulb base types.

Systematic nomenclature identifies mass market lamps as to overall shape power rating length color and other electrical and illuminating characteristics. Pin type bases are normally used for track lighting landscape bulbs. This type of fluorescent tube lighting is the most popular because of its high cri and many color temperature options. T8 lights are a good choice for an adjustable lighting system because of their color temperature range from a soft yellow white to bright daylight.

By eliminating bulbs that don t match your base type you are on the right track to finding the right type of fluorescent light bulb. Certain longer fluorescent led tubes will be assessed a shipping surcharge. The most commonly available is the t8 bulbs. Linear fluorescent tubes are the most common type of fluorescent lamps.

All fluorescent lamps use the same technology but there are several different variations and sizes. Frequently fluorescent bulbs will have either a single pin or bi pin two pin base type. T12s are 1 5 inch diameter fluorescent tubes. Also what is the shape of your bulb.

Look at your fixture to determine its base type. Screw bases 10mm miniature screw e10 11mm miniature candelabra e11 12mm candelabra e12 14mm european e14 17mm intermediate e17 26mm medium e26 27mm european medium e27 39mm mogul e39 fluorescent pin bases miniature bipin medium bipin single pin recessed double contact 4 pin single ended 4 pin 2gx 13 axial twist lock bases 10mm gu10 10mm gx10 24mm gu24. Medium standard base code. T8 fluorescent bulb 32 watt pin spacing 13mm sold in a wide range of color temperature and light output in lumens straight or u shaped.

Connects to a medium bi pin g13 base. Look at your fixture to determine its base type. Pin type bases base codes gu5 3 gu10 and gu24. For alaska hawaii the base rate is 27 59 and surcharges may apply for larger orders.

Candelabra base code. Since their introduction as a commercial product in 1939 many different types of fluorescent lamp have been introduced. There are three common sizes shown in the chart the below. The common terms are medium intermediate candelabra and mogul.

Connects to miniature g5 base. This is to cover all of the additional shipping materials that are needed to ensure a safe. T5 fluorescent bulb 13 watt from ge pin spacing 5 mm. The difference is in the diameter.

Some will have a recessed double contact. The most familiar is the edison screw base found on most incandescent bulbs and many halogen compact fluorescent hid and now ledbulbs.