Replacement bulbs Fluorescent tubes T4 20w T4 fluorescent tube (3400K, 565mm inc pins, 553mm excl pins)

20w T4 fluorescent tube (3400K, 565mm inc pins, 553mm excl pins)

20w T4 fluorescent tube (3400K,  565mm inc pins, 553mm excl pins)


This is product manufacturers code T4/20W by LyvEco. If you need to contact us about this product, please quote our product reference of 15014.

This low energy 20w T4 tube is from LyvEco and replaces similar sized tubes manufactured by Brackenheath and Greenbrook. These fluorescent tubes are used in under cupboard lights, kitchen strip lights, and some illuminated mirrors. warm white (3400K)

This 20w bulb is 553mm long excluding pins and 565mm long including pins. The manufacturer specifies a tolerance of +/- 3mm for these tubes.

Please note: When buying T4 lamps, it is important to purchase lamps from the same manufacturer as the light fitting that you have or at least check the size very carefully. T4 lamps vary between manufacturers in tube length and cap style, so are unlikely to fit other manufacturers fittings.

T4 fluorescent fittings have been discontinued since 2015 due to EU regulations. The electronics are located in the light fitting and not the tube. If you are finding your lamps are not lasting as long as expected, this would indicate a fault in the light fitting and not the tube - unless the tube is physically smashed it's very unlikely to have a fault. You can test tubes and fittings by swapping tube from another working fitting. Unfortunately manufacturers no longer provide a guarantee for T4 tubes, as the light fittings they are installed into may be approaching the end of their life.

May also replace the following manufacturers part codes - check dimensions to be sure: C34A, MLLT20, MLLT20WW, T420W355T, Knightsbridge LL T20W, 20w T4 Standard, T4 20w/1

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(inc. VAT at 20%)
(inc. VAT)

Quantity discounts

Quantity Price each
1 £3.56
2-3 £3.02
4-9 £2.74
10-49 £2.58
50-99 £2.40
100-499 £2.30
500+ £2.21

Product variations


Our product ref
Total wattage
Lamp cap
Bulb type
T4 Fluorescent Tube
Low energy
Mfr part #


20w T4 lamp used in kitchen lighting 553mm excluding pins, 565mm including pins