
For decades, T5 fluorescent lamps have been a familiar sight in various professional and utilitarian environments, from office buildings and shops to warehouses and public spaces. These tubular fluorescent lamps are distinguished by their slim diameter of 16 millimetres (5/8 inch) and their characteristic G5 fitting, where the two pins at each end of the tube are exactly 5 millimetres apart. They are known for their high light output relative to their size, making them very efficient for general lighting.
Traditional T5 fluorescent lamps always operate with an electronic ballast, also known as a high-frequency (HF) ballast. This means they start instantly and without flickering, unlike older fluorescent types that require a starter. This advanced technology made the T5 a more energy-efficient and comfortable alternative at the time.
In line with the European Ecodesign Directive and strict regulations on the use of mercury in lighting products, the production and import of traditional T5 fluorescent lamps have been gradually phased out. As of September 2023, most conventional T5 fluorescent lamps are no longer available for new purchase within the European Union. This measure encourages the switch to more sustainable and environmentally friendly alternatives, with T5 LED tubes becoming the most logical and cost-effective choice.
Switching from traditional T5 fluorescent tubes to T5 LED tubes offers a wide range of benefits that are significant both financially and operationally. These modern light sources are not just replacements; they represent a significant upgrade for your lighting system.
T5 fluorescent lamps are available in specific lengths, which are linked to their wattage. When switching to T5 LED, it is important to select the correct length and the corresponding replacement wattage. Although the LED version itself has a lower wattage, it provides the same or even higher light output than the traditional lamp it replaces.
The most common lengths of T5 fluorescent lamps, and their typical LED replacements, are shown in the following table:
Conventional T5 Length (cm) | Conventional T5 Wattage (W) | LED T5 Replacement Wattage (W) | Example Application |
---|---|---|---|
55 | 14, 24 | 7-10 | Small spaces, decorative lighting |
85 | 21, 39 | 10-14 | Kitchens, hallways, showcases |
115 | 28, 54 | 12-20 | Offices, showrooms, classrooms |
145 | 35, 49, 80 | 20-35 | Large offices, warehouses, production areas |
Replacing your existing T5 fluorescent tubes with energy-efficient T5 LED versions is a very user-friendly process. Because traditional T5 lamps already operate with an electronic ballast (HF ballast), most T5 LED tubes are designed as a direct 1-to-1 replacement. This means that in most cases, you do not need to make any modifications to your fixture.
Follow these steps for a safe and quick installation:
For a visual demonstration of this process, you can consult the following instruction video: [video: T5 LED tube installation] (Link to installation video).
Besides length and wattage, there are several other crucial technical parameters that determine the performance and suitability of a T5 LED tube. By taking these into account, you can choose the optimal lighting for your specific needs.
The term 'plug-and-play' for T5 LED tubes applies in most cases due to their compatibility with the existing electronic ballast (HF ballast). This is one of the reasons why the switch from T5 to LED is often simpler than with T8, where there is also a conventional (EM) ballast with a starter variant. However, there are nuances.
Some advanced T5 LED tubes are also designed for 'mains-only' connection, which means the ballast must be bypassed or removed, and the lamp is connected directly to the mains voltage (230V). This can lead to even higher efficiency but requires modifications to the fixture's wiring. Always read the product specifications carefully to see if the T5 LED tube is suitable for your type of ballast, or if a direct connection is required/possible. If in doubt, it is advisable to consult a certified electrician. [image: cross-section of a T5 LED tube indicating HF-compatible and direct mains connection]
The phase-out of traditional T5 fluorescent lamps marks the end of an era, but at the same time, it opens the door to a more efficient, sustainable, and reliable lighting solution with T5 LED tubes. By investing in this modern technology, you will immediately benefit from significant energy savings, minimal maintenance costs, and improved light quality. The simple installation makes switching to T5 LED a smart and practical decision for any company or institution that wants to be at the forefront of sustainability and efficiency. Many companies have already successfully made this transition and are noticing the positive impact on their business operations.