30W T8 6ft LED Tube - 4000K Cool White

The Knightsbridge T8LED6 is a 30W 6ft LED tube with a T8 bi-pin base, delivering 3350 lumens of 4000K cool white light at 116lm/W efficacy. The tube is built from shatterproof polycarbonate reinforced with an aluminium internal structure, with an opal diffuser running the full 1778mm length and a 26mm diameter matching standard T8 fluorescent tube dimensions.

Designed as a direct replacement for 6ft fluorescent tubes in offices, retail units, workshops and commercial spaces, the tube requires a compatible LED-ready batten or conversion of an existing fluorescent fitting by bypassing the ballast and wiring directly to mains. The integral driver inside the tube means no external control gear is needed once the fitting is converted. The instant-start technology eliminates warm-up time and the tube reaches full 3350lm output immediately on switching.

The 4000K colour temperature sits in the cool white range, producing a neutral tone between daylight and warm white that suits task-focused environments where colour rendering and visibility matter more than atmospheric warmth. The CRI rating above 80 maintains reasonable colour accuracy for general commercial use. The polycarbonate construction resists impact better than glass fluorescent tubes, reducing breakage risk during installation or maintenance.

The tube carries an IP20 rating for dry indoor use only and operates on 230V 50Hz mains. The L70B50 rating of 20,000 hours indicates the point at which 50% of a batch would have degraded to 70% of initial lumen output, giving a maintenance interval guide for commercial installations with multiple tubes. The tube is not dimmable and must be used on standard switched circuits only.

Product Specification Sheet

Can this replace a standard fluorescent tube directly?

Not without modification. The tube requires either an LED-ready batten designed for direct-wire LED tubes, or conversion of an existing fluorescent fitting by removing or bypassing the ballast and wiring the tube holders directly to 230V mains. An electrician should perform this conversion to ensure safe operation.

What is the difference between 4000K and 3000K tubes?

4000K produces a cooler, more neutral white light that suits offices, retail and task-focused commercial spaces. 3000K produces a warmer, more yellow-toned light preferred in hospitality and residential settings. The choice depends on the atmosphere required rather than absolute brightness.

How long does the tube last?

The L70B50 rating of 20,000 hours means that after 20,000 hours of operation, 50% of a batch would have degraded to 70% of initial output. In a typical office running 10 hours per day, this represents approximately 5.5 years before noticeable dimming occurs.

Is the tube dimmable?

No. The tube is designed for switched operation only and cannot be used with dimmer switches or controls. Attempting to dim a non-dimmable LED tube may cause flickering, buzzing or premature failure.