T8 glass LED tubes: the simplest solution to replace fluorescents

Replacing fluorescent lamps with T8 glass LED tubes reduces energy consumption with no building work or third-party intervention. Standard-format LED bulbs are not suitable for these fittings. Each T8-type LED lamp has the same G13 cap and the same length as the fluorescent it replaces.

Why the T8 glass LED tube outperforms the fluorescent

Conventional fluorescents have been in offices, warehouses and schools for decades. The problem is that they consume more than necessary, degrade over time and produce flicker. T8 LED tubes solve all three problems without changing the fitting.

Energy savings and service life compared

A 36 W fluorescent consumes considerably more than an equivalent 20 W LED tube that delivers the same amount of light. The 50,000-hour service life of an LED tube versus the 8,000–15,000 hours of a fluorescent completely changes the maintenance calculation. Fewer replacements, less intervention time, lower total cost.

The luminous efficacy of 170 lm/W in high-efficiency models means that every watt is converted into more visible light. Real efficiency is measured in lumens per watt, and 170 is a figure no fluorescent can reach.

Advantages of glass over plastic in LED tubes

The difference between a glass and a plastic LED tube is not aesthetic. Glass maintains light transmission better over time.

Plastic yellows, reduces the luminous flux in lm per metre and forces earlier tube replacement. Glass dissipates heat more effectively, which extends the life of the internal driver. For installations with many hours of use, it is the option that works out cheaper in the medium term.

Available connection types

Before ordering the tubes, it is worth knowing what is inside your fitting. There are two common situations.

Direct bypass connection without ballast

The direct connection without ballast bypass is the cleanest option. The ballast is removed and the tube receives voltage directly from the mains through the lamp holders. The result is a simpler electrical installation with no components that could fail over the years.

Compatibility with existing electronic ballast

If you do not want to touch the wiring, the direct T8 LED tube connection with ballast is another option. Some models are compatible with electronic ballasts without modifying anything. It is worth checking compatibility model by model. If in doubt, bypass is always the safest alternative.

Available models by length and wattage

The universal G13 cap is the standard across all T8 models. This ensures that any tube fits any fitting with that same cap. The choice depends on the space length and the wattage required.

T8 LED tube 60 cm 10 W

The 60 cm 10 W T8 LED tube replaces the 18 W fluorescent in small fittings. It is common in display counters, changing rooms and corridors. It delivers around 1,700 lumens depending on the model.

T8 LED tube 120 cm 20 W high luminosity

The 120 cm 20 W T8 LED tube is the best-selling model. The high-luminosity glass LED tube version reaches 3,400 lm. Its efficacy is 170 lm/W. It directly replaces the 36 W fluorescent.

The price of the 120 cm T8 glass LED tube depends on the quantity ordered. From individual units to a pack of 10 T8 glass LED tubes for B2B.

T8 LED tube 150 cm 25 W for large spaces

The 150 cm 25 W T8 LED tube covers 1.5-metre fittings, common in industrial units and warehouses. It replaces the 58 W fluorescent with an energy consumption that falls by more than 55%.

How to install a T8 LED tube step by step

Changing a tube does not require an electrician if the installation already has lamp holders with G13 caps.

Installation in an existing luminaire with bypass

Switch off the power at the distribution board. Remove the fluorescent and disconnect the ballast.

Connect the live and neutral wires directly to the lamp holders. Insert the G13 glass T8 LED tube, turn it a quarter turn and restore the power. The process takes less than ten minutes per light point. The elimination of flicker-free strobe effect is noticeable from the very first switch-on.

Installation in a new weatherproof panel

If the luminaire is heavily deteriorated, it may be more practical to replace the fitting as well. Weatherproof panels for LED tubes come bypass-ready from the factory. With an IP20 indoor protection rating you cover dry spaces, and for wet areas the IP65 version of the weatherproof LED tube panel is the appropriate choice. Check the catalogue of weatherproof panels and batten fittings and the available LED tube accessories.

Most common applications

T8 glass LED tubes work as a lighting solution in almost any space with existing linear-type panel installations.

Offices and meeting rooms

The 4,000 K–6,500 K colour temperature in its neutral range gives a natural light without coldness. The 4,000 K light colour is the most common in offices.

The elimination of flicker reduces eye strain during long working days. The temperature range between 4,000 K and 5,000 K is the most comfortable for sustained work. Warm white 3,000 K is reserved for rest areas where warm whites create a more relaxed atmosphere.

Warehouses and industrial areas

In warehouses, the priority is flux per linear metre. The glass LED tube for offices and warehouses in 120 cm or 150 cm format withstands frequent switching cycles. It contains no mercury or gas, unlike fluorescent lamps, which simplifies disposal at end of life.

Retail and supermarkets

In commercial spaces, the flicker-free glass LED tube is necessary where scanners or cameras are sensitive to flicker. Neutral white is the standard temperature in aisles. Product areas prefer warm whites to enhance colour perception.

Model and price comparison from the catalogue

The table shows the equivalences between conventional fluorescents and T8 glass LED tubes. The savings figures are illustrative examples based on 4,000 hours/year at £0.18/kWh.

For renewals of more than 10 units, the pack of 10 T8 glass LED tubes reduces the unit cost. The payment method for B2B orders includes invoice options for companies. To replace fluorescents with LED tubes throughout an entire floor, check the T8 glass LED tube catalogue.

Frequently asked questions about T8 glass LED tubes

Can I fit a T8 LED tube directly into my fluorescent fitting?

Yes, as long as you use a model compatible with your connection type. With bypass, the tube operates directly from the mains. If you prefer not to touch the wiring, choose a model compatible with electronic ballasts.

What is the difference between a glass and a plastic LED tube?

Glass maintains light transmission better over time and dissipates more heat. Plastic yellows and reduces performance in installations with many hours of use. For intensive use, glass is the most durable option.

Do I need to remove the ballast to install T8 LED tubes?

It depends on the model. The bypass installation T8 LED tube requires removing the ballast and connecting directly to the mains. Other models work with existing electronic ballasts without modifying the wiring. Check the technical datasheet before purchasing.

What length of LED tube do I need to replace my fluorescent?

The length must match that of the fluorescent you are replacing: 60 cm, 120 cm or 150 cm. The universal G13 cap is the same in all cases. If in doubt, measure the old tube between the ends of the pins.

Do T8 LED tubes flicker like fluorescents?

No. Flicker-free glass LED tube models produce no perceptible flicker. This eliminates the stroboscopic effect on moving machinery and reduces eye strain compared to conventional fluorescents.

How much do I save by switching from fluorescent to T8 LED tube?

Savings range between 44% and 57% of energy consumption (illustrative example). With a 50,000-hour service life, maintenance costs also fall due to fewer replacements.

Can T8 LED tubes be installed in IP65 weatherproof panels?

Yes. Weatherproof panels designed for LED tubes accept the same T8 formats. The tubes have an IP20 indoor protection rating for dry spaces. Protection for wet areas is provided by the luminaire, which must be IP65 or higher.