What does T8 mean on a fluorescent tube?

This publication only discusses T8 lamps. What does “T8” mean? The “T” designation in fluorescent lamp nomenclature stands for tubular — the shape of the lamp. The number immediately follow- ing the T gives the diameter of the lamp in eighths of an inch.

What does the F stand for in fluorescent bulbs?

fluorescent
F = type of lighting. 32 = wattage. T8 = shape. “F” stands for fluorescent, which is the type of lighting.

Can I use a T12 bulb in a T8 fixture?

In terms of physical compatibility, both T8 and T12 lamps use the same G13 bi-pin base, so as long as they are the same length (e.g. 4-ft), a T8 lamp will physically fit inside a T12 fixture.

Can I replace T8 with T12?

The main difference between T8 and T12 tubes is the tube’s diameter. T12 tubes are 1.5″ in diameter while T8s are just one inch. All other things—socket sizes, lengths, distance between pins—are the same. T8 LED tubes won’t fall out if you try to install them in a T12 fixture—they’ll fit just fine.

What happens if I put a T12 bulb in a T8 fixture?

If you place T12 tubes in a fixture with a T8 ballast, you will wear out the ballast and have to replace it. If you place T8 tubes in a fixture with a T12 ballast, then the tubes will have a shorter life due to a higher current through the tube.

Can I use a T5 bulb in a T8 fixture?

T5 lamps cannot replace T12 or T8 lamps because of differences in physical and electrical characteristics. T5 lamps come in different lengths than T8 and T12 lamps. A nominal 4-foot T5 lamp is actually shorter than an equivalent T8 lamp [1149 millimeters (45.23 inches) in total].

What are T8 fluorescent lights used for?

T8 lights are commonly used in larger spaces as overhead lighting for example in office spaces, garages or classrooms. This is why you will often see long T8 fluorescent lighting in 4 foot light tubes, 6 feet and 8 feet long.

What do you need to know about T5 fluorescent lights?

Another aspect to remember about T5 fluorescent lighting is the different output possibilities. There are three levels of output available on the market; normal output (NO), high output (HO) and very high output (VHO). The watts needed for T5 lighting will increase with the type of output.

What is a T4 fluorescent tube?

T4 tubes are the smallest of the fluorescent bulb sizes, at only 4 eighths of an inch (0.5 in). Their size is what makes T4 lights popular for under cabinet lighting purposes and accent lighting for displays or a staircase.

Why are T12 fluorescent tube lights still used?

However, there are still many office spaces and homes that use the T12 fluorescent tube lights, especially in older buildings. Another reason why they are still used is the cheaper purchasing price compared to the others, but, they are no longer being made.