Question 1

Can I simply replace a fluorescent tube with an LED tube?

Accepted Answer

Direct replacement of a fluorescent tube with an LED tube depends on your existing ballast type. Many modern LED tubes are compatible with electronic ballasts and work as plug-and-play replacements. However, some LED tubes require ballast bypass (direct connection to mains voltage). Always check the LED tube's specification sheet for compatibility with your fixture's ballast. For new installations or complete retrofits, consider purchasing complete LED tube sets with integrated drivers to eliminate compatibility issues entirely. This approach also simplifies installation on truss systems and ensures optimal performance.

Question 2

What does T5 or T8 mean?

Accepted Answer

The designation T5 or T8 indicates the diameter of a fluorescent tube in eighths of an inch. T8 tubes measure 8/8 inch (exactly one inch or 25.4 mm) in diameter and use G13 sockets with 13 mm pin spacing. T5 tubes measure 5/8 inch (approximately 16 mm) in diameter and use G5 sockets with 5 mm pin spacing. T8 tubes are commonly used for general area lighting in exhibition halls and stage environments, while T5 tubes are preferred for compact installations on truss systems and in tight spaces where their slimmer profile offers installation advantages.

Question 3

How do fluorescent tubes work?

Accepted Answer

Fluorescent tubes generate light through gas discharge technology. The sealed glass tube contains a small amount of mercury vapour and an inert gas (typically argon). When voltage is applied across electrodes at each end, electrons flow through the gas, exciting mercury atoms. These excited atoms emit ultraviolet (UV) radiation. The tube's inner surface is coated with phosphor powder that fluoresces when struck by UV light, converting the invisible UV radiation into visible light. The colour of the emitted light depends on the phosphor coating's chemical composition. A ballast regulates the electrical current to maintain stable operation and prevent the tube from drawing excessive current.

Question 4

What ballast do I need for my fluorescent tube?

Accepted Answer

The required ballast depends on your fluorescent tube's wattage, voltage and socket type. T8 tubes typically use electronic ballasts rated for 18W, 36W or 58W depending on tube length. T5 tubes require ballasts specifically designed for T5 operation, as they operate at higher frequency than T8 tubes. Electronic ballasts (EVGs) are recommended for professional event applications because they provide instant start, flicker-free operation and higher energy efficiency than traditional magnetic ballasts. Always match the ballast's rated wattage to your tube's specification. For dimming applications, select dimmable electronic ballasts compatible with 1–10V or DALI control protocols.

Question 5

Are fluorescent tubes still permitted?

Accepted Answer

Yes, fluorescent tubes remain legal and widely used in professional event technology and commercial installations. However, EU regulations have restricted the sale of certain inefficient fluorescent tube types since September 2023, with additional restrictions planned for 2025. These regulations primarily affect T8 tubes with low energy efficiency. High-efficiency T5 tubes and speciality tubes (such as UV blacklight) are exempt from current restrictions. For new installations, many professionals are transitioning to LED tube alternatives due to their superior energy efficiency, longer lifespan and mercury-free construction. Existing fluorescent tube installations can continue operating, and replacement tubes remain available for maintenance purposes.

Question 6

Which fluorescent tubes are best for UV blacklight effects?

Accepted Answer

For professional UV blacklight effects in event environments, choose tubes specifically designed for UV-A emission (365–370 nm wavelength). These tubes use special phosphor coatings that emit primarily ultraviolet light with minimal visible light output. Common specifications include T8 36W UV tubes at 134 cm length for large-area coverage, or T5 20W UV tubes at 105 cm for compact installations on truss systems. Leading manufacturers such as Eurolite, Omnilux and Osram offer UV tubes rated for professional use. Always verify the tube's UV output specification and ensure your installation complies with EN 62471 photobiological safety standards, maintaining appropriate audience distances and avoiding prolonged direct exposure.

Question 7

What does a complete fluorescent tube set cost?

Accepted Answer

Complete fluorescent tube sets including fixture, tube, ballast and mounting hardware typically range from €25 to €80 depending on tube type and fixture quality. Basic T8 36W sets with simple surface-mount fixtures start around €25–35. Professional-grade sets with electronic ballasts, truss-mount brackets and robust housings suitable for touring applications cost €50–80. Individual replacement tubes are more economical: standard T8 36W tubes cost €3–8, T5 tubes €5–10, and UV blacklight tubes €8–15. LED tube alternatives range from €15–35 per tube depending on length and quality. For large-scale installations, wholesale pricing is available for professional users and resellers.

Question 8

How do I mount fluorescent tubes on truss systems safely?

Accepted Answer

Mounting fluorescent tubes on truss systems requires fixtures with dedicated truss clamps and secondary safety attachments. Use fixtures equipped with quick-release clamps sized for your truss diameter (typically 48–51 mm for standard aluminium truss). Secure each fixture with a safety wire or chain rated to hold at least ten times the fixture's weight, attached to the truss through a separate connection point. Verify that your truss system has adequate load capacity for the combined weight of all fixtures; a typical T8 fixture weighs 1.5–2.5 kg. Ensure all electrical connections are properly insulated and cables are secured to prevent snagging during truss movement. Always comply with DGUV Vorschrift 17 (formerly BGV C1) safety regulations for overhead rigging in event environments.

Fluorescent lamps & glowsticks