Their size is what makes t4 lights popular for under cabinet lighting purposes and accent lighting for displays or a staircase.
Fluorescent light bulb sizes length.
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.
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There is no industry standard for the length or wattage of t4 tube lights.
If you are using a 60 watt incandescent or a 13 watt compact fluorescent cfl you can switch to a 10 watt led bulb.
Ge 40 watt 48 in medium bi pin t12 3500 k bright white fluorescent light bulb 2 pack item 903831.
T4 tubes are the smallest of the fluorescent bulb sizes at only 4 eighths of an inch 0 5 in.
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.
These are known as light bulb codes.
Shapes sizes and bases.
There are three common sizes shown in the chart the below.
The most common form of fluorescent lamp is a straight tube.
Ge 8 watt 12 in miniature bi pin t5 4100 k cool white fluorescent light bulb.
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.
T12s are 1 5 inch diameter.
Sizes range from t2 to t17.
The difference is in the diameter.
Pick from fluorescent bulbs and specialty light bulbs.
All fluorescent lamps use the same technology but there are several different variations and sizes.
Linear fluorescent tubes are the most common type of fluorescent lamps.
For pricing and availability.