Fluorescent Light Bulb Sizes Length

The difference is in the diameter.

Fluorescent light bulb sizes length.

All fluorescent lamps use the same technology but there are several different variations and sizes. Numbers in a bulb code indicate size in millimeters or eighths of an inch. Here you have a simple light bulb replacement guide showing you how easy transitioning from your incandescent bulbs to leds can be. Lamps are typically identified by a code such as fxxty where f is for fluorescent the first number xx indicates either the power in watts or length in inches the t indicates that the shape of the bulb is tubular and the last number y is the diameter in eighths of an inch sometimes in millimeters rounded up to the nearest millimeter.

For pricing and availability. Their size is what makes t4 lights popular for under cabinet lighting purposes and accent lighting for displays or a staircase. Ge 40 watt 48 in medium bi pin t12 3500 k bright white fluorescent light bulb 2 pack item 903831. T12s are 1 5 inch diameter.

The letter or letters in a bulb code indicate either shape or special features such as reflector type. Shapes sizes and bases. Linear fluorescent tubes are the most common type of fluorescent lamps. T4 tubes are the smallest of the fluorescent bulb sizes at only 4 eighths of an inch 0 5 in.

Ge 8 watt 12 in miniature bi pin t5 4100 k cool white fluorescent light bulb. The most common form of fluorescent lamp is a straight tube. All led can be screwed in like traditional bulbs. The diameter of the tube is described in eighths of an inch as it is for incandescent lamps so a fluorescent lamp 1 inch in diameter eight eighths is a t8.

Sizes range from t2 to t17. If you are using a 60 watt incandescent or a 13 watt compact fluorescent cfl you can switch to a 10 watt led bulb. There are three common sizes shown in the chart the below. Pick from fluorescent bulbs and specialty light bulbs.

These are known as light bulb codes. 1 888 455 2800 fax 1 508 363 2900.