What is the size of a T5 LED tube light?

Oct 22, 2025

Hey there! As a supplier of T5 LED tube lights, I often get asked about the size of these nifty lighting solutions. So, I thought I'd take a deep dive into this topic and share everything you need to know.

First off, let's talk about what a T5 LED tube light actually is. T5 LED tube lights are a popular choice for both residential and commercial lighting. They're energy - efficient, long - lasting, and provide a bright, uniform light. These tubes are a modern upgrade from the traditional fluorescent tubes, and they come in a variety of sizes to fit different applications.

The "T5" in the name refers to the tube's diameter. The "T" stands for "tubular," and the number following it indicates the diameter in eighths of an inch. So, for a T5 tube, the diameter is 5/8 of an inch, which is approximately 16mm. That's a relatively slim profile compared to some other tube light options, making T5 LED tube lights a great choice when space is limited.

Now, let's get into the lengths. T5 LED tube lights come in several standard lengths, and these are the ones you're most likely to encounter in the market.

Common Lengths of T5 LED Tube Lights

2 - foot (2ft)

The 2 - foot T5 LED tube light is a great option for smaller spaces. It's commonly used in under - cabinet lighting, display cases, and some types of decorative lighting. These shorter tubes are easy to install and can be used in multiples to create a continuous lighting effect. If you're looking for a 2 - foot T5 LED tube light, you can check out our 4ft Lighting Led Tubes Integrated T5 page, where we have a variety of options to choose from.

T5 LED Integrated Tube Light With Wide Angle Reflector For Industry UseT5 LED Tube Lights

4 - foot (4ft)

The 4 - foot T5 LED tube light is one of the most popular lengths. It's widely used in commercial settings like offices, warehouses, and schools. In these large - scale spaces, multiple 4 - foot tubes can be installed side by side to provide ample lighting. They're also a common choice for retrofit projects, where old fluorescent tubes are being replaced with more energy - efficient LED alternatives. Our T5 LED Tube Lights page has a great selection of 4 - foot tubes that are perfect for these types of applications.

5 - foot (5ft) and 6 - foot (6ft)

For even larger areas, 5 - foot and 6 - foot T5 LED tube lights are available. These longer tubes are often used in industrial settings, such as factories and large - scale storage facilities. They can cover more ground with fewer fixtures, which can simplify the installation process. If you're in the industry and need these longer lengths, our T5 LED Integrated Tube Light With Wide Angle Reflector For Industry Use might be just what you're looking for.

Why Size Matters

The size of a T5 LED tube light is crucial for a few reasons. First of all, it determines where you can use the tube. As I mentioned earlier, smaller tubes are ideal for confined spaces, while longer tubes are better suited for large - area illumination.

Secondly, the size can affect the light output. Generally, longer tubes will provide more light than shorter ones, but this also depends on the wattage and the quality of the LED chips used. When choosing a tube light, you need to consider how much light you actually need for your space. If you install a tube that's too short, you might not get enough illumination, and if it's too long, it could be overkill and waste energy.

Another factor to consider is the compatibility with existing fixtures. If you're doing a retrofit project, you need to make sure the new T5 LED tube light will fit into the old fixture. Most of the time, the length and diameter of the T5 tube will be designed to be compatible with standard fluorescent fixtures, but it's always a good idea to double - check.

Custom Sizes

In addition to the standard lengths, we also offer custom - sized T5 LED tube lights. Sometimes, customers have unique lighting requirements that can't be met with off - the - shelf products. Maybe they're working on a special architectural project or have a non - standard fixture. In these cases, we can work with you to create a T5 LED tube light that's the perfect size for your needs. Just reach out to us, and we'll do our best to accommodate your request.

Making the Right Choice

When it comes to choosing the right size of T5 LED tube light, there are a few things you should keep in mind. First, measure the space where you plan to install the tube. This will give you a clear idea of what length will work best. Also, think about the amount of light you need. If it's a bright - lit area like a workshop, you might want to go for a longer tube or multiple tubes.

Consider the type of fixture you have or plan to use. Some fixtures are designed for specific lengths, so make sure the tube you choose is compatible. And don't forget about the wattage. A higher - wattage tube will generally provide more light, but it will also consume more energy. So, find a balance that meets your lighting needs while keeping your energy costs in check.

Contact Us for Your T5 LED Tube Light Needs

If you're still not sure which size of T5 LED tube light is right for you, or if you have any other questions, don't hesitate to get in touch. We're here to help you make the best choice for your lighting project. Whether you need a single tube for a small DIY project or a large quantity for a commercial installation, we've got you covered.

So, if you're ready to take the next step and start lighting up your space with high - quality T5 LED tube lights, reach out to us for a quote and let's get the ball rolling on your lighting upgrade.

References

  • Lighting Industry Association publications on LED tube lights
  • Manufacturer's specifications for T5 LED tube lights