Skip to content
Home Get In Touch About Us Account Open a Trade Account

20w at Sparks Warehouse

Shop the full range of the 20w, available at a competitive price.

Sparks Warehouse takes pride in being one of the UK's biggest and most trusted electrical supplier with an extensive offering of over 200 000 products. Need help finding the product you need? Get in touch with our friendly support team and we should be able to assist you in sourcing.

20w

Refine

view all

Product Group

Price

clear

Colour

Light Bulb Cap

Wattage

clear

Voltage

Brand

  • Knightsbridge T420TUBE 20W T4 Fluorescent TUBE KB Knightsbridge - Sparks Warehouse

    Knightsbridge T420TUBE 20W T4 Fluorescent TUBE - DISCONTINUED

    Knightsbridge
    £3.49 GBP - £3.49 GBP
    £3.49 GBP
    £3.49 GBP - £3.49 GBP
    £3.49 GBP

    T4 20 Watt 4000k Cool White Tube. Length: 565mm

    £3.49 GBP - £3.49 GBP
    £3.49 GBP
    £3.49 GBP - £3.49 GBP
    £3.49 GBP
  • GU4 20W Halogen Spot - 10Deg - 12v - Casell - sparks-warehouse
    Sold out

    GU4 20W Halogen Spot MR11 35mm - 10 Deg - 12v

    Casell
    £2.98 GBP - £2.98 GBP
    £2.98 GBP
    £2.98 GBP - £2.98 GBP
    £2.98 GBP

    12v 20w GU4 35mm MR11 10 degree Dichroic Reflector Bulb with Glass Front. Specification Category Halogen Lighting Type Halogen Spot Bulbs Ca...

    View full details
    £2.98 GBP - £2.98 GBP
    £2.98 GBP
    £2.98 GBP - £2.98 GBP
    £2.98 GBP
    Sold out
  • GY6.35 20W Halogen Capsule - Axial Filament - 12v - Casell - sparks-warehouse

    GY6.35 20W Halogen Capsule - Axial Filament - 12v

    Casell
    £1.80 GBP - £1.80 GBP
    £1.80 GBP
    £1.80 GBP - £1.80 GBP
    £1.80 GBP

    Specification Category Halogen Lighting Type 2-Pin Halogen Capsule Bulbs Cap GY6.35 Volts 12v Watts 20w Finish/Colour Clear Life 2...

    View full details
    £1.80 GBP - £1.80 GBP
    £1.80 GBP
    £1.80 GBP - £1.80 GBP
    £1.80 GBP
  • G4 20W Bulb Halogen Capsule - 12v - Casell - sparks-warehouse

    G4 20W Bulb Halogen Axial Filament Capsule - 12v

    Casell
    £1.92 GBP - £1.92 GBP
    £1.92 GBP
    £1.92 GBP - £1.92 GBP
    £1.92 GBP

    Specification Category Halogen Lighting Type 2-Pin Halogen Capsule Bulbs Cap G4 Volts 12v Watts 20w Finish/Colour ...

    View full details
    £1.92 GBP - £1.92 GBP
    £1.92 GBP
    £1.92 GBP - £1.92 GBP
    £1.92 GBP
  • T4 20w White/835 578mm Fluorescent Striplight Tube for Eterna Fitting - 3500 Kelvin - Casell - sparks-warehouse

    T4 20w White/835 578mm Fluorescent Striplight Tube for Eterna Fitting - 3500 Kelvin

    Casell
    £8.05 GBP - £8.05 GBP
    £8.05 GBP
    £8.05 GBP - £8.05 GBP
    £8.05 GBP

     Length Quoted for a florescent tube includes the pins at each end   Specification Category Fluorescent Tubes Type T4 F...

    View full details
    £8.05 GBP - £8.05 GBP
    £8.05 GBP
    £8.05 GBP - £8.05 GBP
    £8.05 GBP
  • M252 GU5.3 20W Spot bulb - 12v - Blue Halogen Bulbs Casell - Sparks Warehouse

    M252 GU5.3 20W Spot bulb - 12v - Blue

    Casell
    £6.56 GBP - £6.56 GBP
    £6.56 GBP
    £6.56 GBP - £6.56 GBP
    £6.56 GBP

    Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU4 Volts 12v Watts 20w Finish/Colour Blue Life 3000 hours L...

    View full details
    £6.56 GBP - £6.56 GBP
    £6.56 GBP
    £6.56 GBP - £6.56 GBP
    £6.56 GBP
  • Knightsbridge T8LEDP18DL 230V IP20 20W T8 4ft LED Tube 6000K Light Switches Knightsbridge - Sparks Warehouse
    Save £4.53 GBP Save £0.00 GBP

    Knightsbridge T8LEDP18DL 230V IP20 20W T8 4ft LED Tube 6000K

    Knightsbridge
    £9.97 GBP
    £9.97 GBP - £9.97 GBP
    £9.97 GBP
    £5.44 GBP
    £5.44 GBP - £5.44 GBP
    £5.44 GBP

    230V 20W T8 LED Tube - 4ft Alternative to classic T8 fluorescent lampsInstant ignition Integral driver and mercury free components, ensuring safety...

    View full details
    £9.97 GBP
    £9.97 GBP - £9.97 GBP
    £9.97 GBP
    £5.44 GBP
    £5.44 GBP - £5.44 GBP
    £5.44 GBP
    Save £4.53 GBP Save £0.00 GBP
  • Casell M269-CA Halogen Spot 20w 12v GU5.3 51mm 36° Dichroic Light Bulb - Casell - Sparks Warehouse

    Casell M269-CA Halogen Spot 20w 12v GU5.3 51mm 36° Dichroic Light Bulb

    Casell
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
    £2.34 GBP - £2.34 GBP
    £2.34 GBP

    Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU5.3 Volts 12v Watts 20w Finish/Colour Clear Life 3000 hours ...

    View full details
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
  • GU5.3 20W Halogen Spot - 24° - 12v - Casell - sparks-warehouse

    GU5.3 20W Halogen Spot - 24° - 12v

    Casell
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
    £2.34 GBP - £2.34 GBP
    £2.34 GBP

    Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU5.3 Volts 12v Watts 20w Finish/Colour Clear Life 3000 hours ...

    View full details
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
    £2.34 GBP - £2.34 GBP
    £2.34 GBP
  • G4 20W Halogen Capsule - 12V Halogen Bulbs Casell - Sparks Warehouse

    G4 20W Halogen Capsule - 12V

    Casell
    £1.74 GBP - £1.74 GBP
    £1.74 GBP
    £1.74 GBP - £1.74 GBP
    £1.74 GBP

    Specification Category Halogen Lighting Type 2-Pin Halogen Capsule Bulbs Cap G4 Volts 12v Watts 20w Finish/Colour Clear Life 2000 ho...

    View full details
    £1.74 GBP - £1.74 GBP
    £1.74 GBP
    £1.74 GBP - £1.74 GBP
    £1.74 GBP
  • GU4 20W Halogen Spot - 17Deg - 12v - Casell - sparks-warehouse

    M251 - GU4 20W Halogen Spot - 17Deg - 12v

    Casell
    £4.78 GBP - £4.78 GBP
    £4.78 GBP
    £4.78 GBP - £4.78 GBP
    £4.78 GBP

    Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU4 Volts 12v Watts 20w Finish/Colour Clear Life 3000 hours ...

    View full details
    £4.78 GBP - £4.78 GBP
    £4.78 GBP
    £4.78 GBP - £4.78 GBP
    £4.78 GBP
  • Casell M269-ALU-CA Halogen Spot 20w 12v GU5.3 51mm 36° Aluminium Light Bulb - Casell - Sparks Warehouse

    Casell M269-ALU-CA Halogen Spot 20w 12v GU5.3 51mm 36° Aluminium Light Bulb

    Casell
    £4.14 GBP - £4.14 GBP
    £4.14 GBP
    £4.14 GBP - £4.14 GBP
    £4.14 GBP

    Halogen Aluminium reflector. Pushes the Heat Forward Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU5.3 Volt...

    View full details
    £4.14 GBP - £4.14 GBP
    £4.14 GBP
    £4.14 GBP - £4.14 GBP
    £4.14 GBP
  • Low Energy Spiral 20W BC / B22 - Warm White Compact Fluorescent Lamps The Lamp Company - Sparks Warehouse

    Low Energy Spiral 20W BC / B22 - Warm White

    The Lamp Company
    £3.00 GBP - £3.00 GBP
    £3.00 GBP
    £3.00 GBP - £3.00 GBP
    £3.00 GBP

    Specification Category Energy Saving Bulbs Type Energy Saving Spiral Cap B22d/BC Volts 240v Watts 20w Energy saving replacement for 10...

    View full details
    £3.00 GBP - £3.00 GBP
    £3.00 GBP
    £3.00 GBP - £3.00 GBP
    £3.00 GBP
  • G4 20W Halogen Capsule - 24V - Casell - sparks-warehouse

    G4 20W Halogen Capsule - 24V

    Casell
    £5.40 GBP - £5.40 GBP
    £5.40 GBP
    £5.40 GBP - £5.40 GBP
    £5.40 GBP

    Specification Category Halogen Lighting Type 2-Pin Halogen Capsule Bulbs Cap G4 Volts 24v Watts 20w Finish/Colour Clear Life 2000 ho...

    View full details
    £5.40 GBP - £5.40 GBP
    £5.40 GBP
    £5.40 GBP - £5.40 GBP
    £5.40 GBP
  • Knightsbridge T8LEDP18CW 230V IP20 20W T8 4ft LED Tube 4000K Light Switches Knightsbridge - Sparks Warehouse
    Save £5.87 GBP Save £0.00 GBP

    Knightsbridge T8LEDP18CW 230V IP20 20W T8 4ft LED Tube 4000K

    Knightsbridge
    £11.31 GBP
    £11.31 GBP - £11.31 GBP
    £11.31 GBP
    £5.44 GBP
    £5.44 GBP - £5.44 GBP
    £5.44 GBP

    230V 18W T8 LED Tube - 4ft Alternative to classic T8 fluorescent lamps up to 130lm/w Instant ignition Integral driver 4000K, Cool White, 2295lm N...

    View full details
    £11.31 GBP
    £11.31 GBP - £11.31 GBP
    £11.31 GBP
    £5.44 GBP
    £5.44 GBP - £5.44 GBP
    £5.44 GBP
    Save £5.87 GBP Save £0.00 GBP
  • GU4 20W Halogen Spot - 10Deg - 24v - Casell - sparks-warehouse

    GU4 20W Halogen Spot - 10Deg - 24v

    Casell
    £5.41 GBP - £5.41 GBP
    £5.41 GBP
    £5.41 GBP - £5.41 GBP
    £5.41 GBP

    Specification Category Halogen Lighting Type Halogen Spot Bulbs Cap GU4 Volts 24v Watts 20w Finish/Colour Clear Life 3000 hours Le...

    View full details
    £5.41 GBP - £5.41 GBP
    £5.41 GBP
    £5.41 GBP - £5.41 GBP
    £5.41 GBP
  • Low Energy GLS Bulb 20W ES / E27 - Warm White Compact Fluorescent Lamps Casell - Sparks Warehouse
    Sold out

    Low Energy GLS Bulb 20W ES / E27 - Warm White

    Casell
    £5.75 GBP - £5.75 GBP
    £5.75 GBP
    £5.75 GBP - £5.75 GBP
    £5.75 GBP

    Specification Category Energy Saving Bulbs Type Energy Saving GLS Bulb Cap E27/ES Volts 240v Watts 20w Energy saving replacement for 1...

    View full details
    £5.75 GBP - £5.75 GBP
    £5.75 GBP
    £5.75 GBP - £5.75 GBP
    £5.75 GBP
    Sold out
  • Sold out

    Philips LED Tube T8 Ecofit (Mains AC) 20W 2000lm - 865 Daylight | 150cm - Replaces 58W - DISCONTINUED

    Philips
    £4.99 GBP - £4.99 GBP
    £4.99 GBP
    £4.99 GBP - £4.99 GBP
    £4.99 GBP

    Philips Ecofit LEDtube 1500mm 20W 865 T8 - LED Tube T8 Ecofit (Mains AC) 20W 2000lm - 865 Daylight | 150cm - Replaces 58W

    £4.99 GBP - £4.99 GBP
    £4.99 GBP
    £4.99 GBP - £4.99 GBP
    £4.99 GBP
    Sold out
  • Sold out

    Philips LED Tube T8 EcoFit 20W 840 150cm 2000lm | Cool White - Replaces 58W - DISCONTINUED

    Philips
    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    £6.03 GBP - £6.03 GBP
    £6.03 GBP

    Philips Ecofit LEDtube 1500mm 20W 840 T8 - LED Tube T8 EcoFit 20W 840 150cm 2000lm | Cool White - Replaces 58W

    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    Sold out
  • Sold out

    Schiefer Halogen GY4 48x38mm 24V 20W 10° 2000h Clear (Osram alternative 41930SP) 2800K Dimmable - DISCONTINUED

    Schiefer
    £9.13 GBP - £9.13 GBP
    £9.13 GBP
    £9.13 GBP - £9.13 GBP
    £9.13 GBP

    Schiefer Halogen GY4 48x38mm 24V 20W 10° 2000h Clear (Osram alternative 41930SP) 2800K Dimmable - 644839710. Halogen. Schiefer Code: 644839710

    £9.13 GBP - £9.13 GBP
    £9.13 GBP
    £9.13 GBP - £9.13 GBP
    £9.13 GBP
    Sold out

  • Schiefer Halogen MR11 GU4 35x38mm 12V 20W 2000h Clear Cover 30° 3000K Dimmable - 642131330

    Schiefer
    £4.78 GBP - £4.78 GBP
    £4.78 GBP
    £4.78 GBP - £4.78 GBP
    £4.78 GBP

    Schiefer Halogen MR11 GU4 35x38mm 12V 20W 2000h Clear Cover 30° 3000K Dimmable - 642131330. Halogen. Schiefer Code: 642131330

    £4.78 GBP - £4.78 GBP
    £4.78 GBP
    £4.78 GBP - £4.78 GBP
    £4.78 GBP

  • Schiefer Halogen MR8 GU4 23x35mm 12V 20W 2000h Clear Cover 26° 3000K Dimmable - 641931326

    Schiefer
    £4.97 GBP - £4.97 GBP
    £4.97 GBP
    £4.97 GBP - £4.97 GBP
    £4.97 GBP

    Schiefer Halogen MR8 GU4 23x35mm 12V 20W 2000h Clear Cover 26° 3000K Dimmable - 641931326. Halogen. Schiefer Code: 641931326

    £4.97 GBP - £4.97 GBP
    £4.97 GBP
    £4.97 GBP - £4.97 GBP
    £4.97 GBP

  • Philips LED Tube CorePro LEDtube 1500mm 20W 865 T8 - Replaces 58W

    Philips
    £5.99 GBP - £5.99 GBP
    £5.99 GBP
    £5.99 GBP - £5.99 GBP
    £5.99 GBP

    Philips LED Tube CorePro LEDtube 1500mm 20W 865 T8 - Replaces 58W

    £5.99 GBP - £5.99 GBP
    £5.99 GBP
    £5.99 GBP - £5.99 GBP
    £5.99 GBP
  • Sold out

    Philips Ecofit LEDtube 1500mm 20W 840 T8 - LED Tube T8 Ecofit (Mains AC) 20W 2000lm - 840 Cool White | 150cm - Replaces 58W - DISCONTINUED

    Philips
    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    £6.03 GBP - £6.03 GBP
    £6.03 GBP

    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    £6.03 GBP - £6.03 GBP
    £6.03 GBP
    Sold out