Difference Between T5 & T8 Light Bulbs

If you are new to the world of lighting, you probably have some questions. When it comes to the difference between T5 light bulbs and T8 light bulbs, there are a few things to keep in mind when choosing between the two options.

The major physical difference between T5 light bulbs and T8 light bulbs would be the length and diameter of the tube itself. The T5 tends to be slightly shorter than the T8 tube, and is significantly smaller in diameter. This factor is important to consider when looking at your fixture as the two tubes are not interchangeable.

Another factor that separates these two bulbs would be the lumen output capabilities. For example, a standard 4’ 54 watt T5HO linear tube will usually yield around 5000 lumens per tube whereas a standard 4’ 32 watt T8 tube will offer approximately 3000 lumens per tube. When considering this difference between the two tube options, it is also important to keep in mind the lighting application requirements of your space. If you do not need as many lumens, a smaller T8 will be the better choice since it offers lower lumen and watt consumption. If you need higher levels of lighting, the T5 might be ideal for your situation.

When choosing linear fluorescent tubes of this type, you have several other options you need to consider as well. For instance, both T5 and T8 tubes are available in various color temperature choices. This factor plays just as big of a role as the lumen output. For example, if you are considering a tube type for use in an office setting, you will naturally want to select either a lower lumen output, a warmer color temperature, or perhaps both, depending on the area. Office settings tend to generate complaints when an excessive lumen output or too cool of a color temperature is selected.

Once you have decided your color temperature and lumen output needs, deciding between T5 and T8 fixtures will be much easier to navigate.

For a closer look at this matter, check out this video.

Other related videos/articles:

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Difference between T5 & T8 Low Bay Fluorescent Lighting Fixtures

Difference between T5 & T8 High Bay Lighting Fixtures

T5 vs. T8 Lighting Fixture

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T5 vs. T8 & T12

Replacing T12 with T8 or T5 Tubes

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Video Transcription

Hi, this is James Abraham with Warehouse Lighting. I’d like to explain the difference between T5 light bulbs and T8 light bulbs. There’s different options here you can get from us. You can get anywhere from 3000k which is on the redder spectrum to a 6500k which would be true to light outside type light. A couple things to notice here is the T5 is shorter, slightly shorter, than the T8 so it has to fit in the fixture. You can get different lengths of these, both of these, one for, you can use them for a two by two troffer, you could use them for a high bay fixture. The two main differences between these are well, one, the length and two, the wattage output and the lumen output. A T5 has approximately 5000 lumens per lamp and is also 54 watts per bulb, so, and a T8 gives you about 3000 lumens, depending on the ballast, low ballast factor being less probably around 2700, high ballast factor being about 3000. The T8 is a 32 watt and both of these, like I said, come in different colors of K values or Kelvin values. You know, you could actually get 3000, 3500, 4100, 5000, and also 6500. A good rule of thumb when thinking about what type of K value you need with these lamps is to, you know, in an industrial atmosphere, or, you know, right in our warehouse right here, you’re going to use a, you know, something like around a 5000 or a 6500. I have had complaints of people saying that they get headaches with the 6500 bulb, so I always kind of push them towards the 5000. In an office setting, you’re going to use anywhere from probably a 4100, you can use a 5000, but I suggest, you know, it seems like we get a lot more complaints in the offices that we have 5000’s, and not 4100, so that’s a good rule of thumb when thinking about buying which fixture or which lamp that would be suitable for your application. If you have questions, we’re here to answer. So, if you would call 414 525 9027 or you can go to our website at www.warehouse-lighting.com. Again, that’s www.warehouse-lighting.com. Feel free to ask us any questions you guys want. So, have a great day. Appreciate you stopping by.