CFL Bulbs

CFLs (Compact Fluorescent Lamps) are energy-saving bulbs consisting of a fluorescent tube that has been made into a shape the same size as a traditional incandescent light bulb.

How does a CFL work?

CFL Bulbs contain gases that are given an electric current, generating UV light which then excites the gasses. A phosphorous layer is then produced on the inside which glows, giving off light. There is very little heating involved.

What shape are CFLs?

Compact fluorescent light bulbs come in various shapes, such as:

  • Candle bulbs represent the shape of a flame, with a pointed tip, and are often used in decorative fixtures, especially slimmer designs that can't accommodate a globe or spiral bulb.
  • Globe bulbs are spherical shaped and are often used in vanity mirrors and bathroom pendants. They may take longer to reach full brightness but will become as bright as other CFLs.
  • Spiral bulbs have a fluorescent tube that is shaped into a spiral curve. This is the most common CFL bulb shape, producing the same amount of light as an incandescent bulb.
  • Stick or tube bulbs usually consist of multiple tubes which are straight. Like candle bulbs, they are commonly used in slimmer lighting fixtures.

What colour are CFL bulbs?

CFL light bulbs come in many variations of white. They are most commonly classed as "Cool White" or "Warm White", which describes the colour temperature of the light that the bulb emits. Colour temperature is a measurement of the light output, given in Kelvin (K). The higher the value, the cooler the white. For example, 5000K would be cool white lighting.

CFL Bases:

The base of the bulb depicts what fitting it pairs with. CFL lamps usually have a push and twist bayonet or Edison screw base, both of which are available in various sizes.

Why choose a CFL bulb?

Fluorescent bulbs are designed to be more energy-efficient than incandescent or halogen bulbs. They have a very low energy consumption which also saves money on electricity bills, over time. CFL bulbs have a much longer lifetime too, of up to approximately 10 years. The lifetime of the light bulb will be stated in hours.

What is CFL Equivalent Wattage?

Although CFLs do not use the same technology as incandescent bulbs, they are often given a comparable wattage value, providing an easy comparison to the equivalent wattage.


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Description Price Shape Wattage Lamp Base Length Colour Temperature Incandescent Equivalent Wattage Colour Tone Colour Rendering Colour Reference Diameter Number of loops Luminosity Life Hours EU Energy Efficiency Rating
RS Stock No. 792-6801
Mfr. Part No.4050300327211
BrandOsram
kr 43,80
Each
Units
Quad Tube 18 W G24q-2 146 mm 3000K - Warm White 89 830 27mm 2 1200 lm 20000h A
RS Stock No. 792-6794
Mfr. Part No.4050300025704
BrandOsram
kr 43,80
Each
Units
Quad Tube 18 W G24d-2 153 mm 3000K - Warm White 89 830 27mm 2 1200 lm 10000h B
RS Stock No. 792-6811
Mfr. Part No.4050300010731
BrandOsram
kr 64,54
Each
Units
Quad Tube 18 W 2G11 217 mm 3000K - Warm White 89 830 18mm 2 1200 lm 20000h A
RS Stock No. 702-5337
Mfr. Part No.18PLC8304PIN
kr 41,80
Each
Units
2D 18 W G24q-2 143 mm 3000K 100W Warm White 82 830 27mm 2 1200 lm 13000h B
RS Stock No. 711-7196
Mfr. Part No.25000
BrandSylvania
kr 72,631
Each (In a Pack of 10)
Units
2D 28 W GR10q 207 mm 4000K - Cool White 82 840 205mm 1 2050 lm 10000h A
RS Stock No. 702-5422
Mfr. Part No.38PLQ8404PIN
kr 104,924
Each (In a Pack of 10)
Units
2D 38 W GR10q 207 mm 4000K 38W Cool White 82 840 205mm 1 2850 lm 12000h B
RS Stock No. 792-6823
Mfr. Part No.4050300010793
BrandOsram
kr 72,71
Each
Units
Quad Tube 36 W 2G11 411 mm 3000K - Warm White 89 830 17.5mm 2 2900 lm 20000h A
RS Stock No. 702-5378
Mfr. Part No.26PLT8404PINCS
kr 75,04
Each
Units
Six Tube 26 W GX24q-3 127 mm 4000K 150W Cool White 82 840 41mm 3 1800 lm 13000h B
RS Stock No. 407-5705
Mfr. Part No.55PLL830
kr 81,91
Each
Units
Twin Tube 55 W 2G11 542 mm 3000K 400W Warm White 82 830 38mm 1 4800 lm 20000h A
RS Stock No. 792-6817
Mfr. Part No.4050300025759
BrandOsram
kr 40,05
Each
Units
Quad Tube 11 W G23 237 mm 3000K - Warm White 89 830 27mm 2 900 lm 10000h A
RS Stock No. 792-6798
Mfr. Part No.4050300025711
BrandOsram
kr 42,90
Each
Units
Quad Tube 26 W G24d-3 172 mm 3000K - Warm White 89 830 27mm 2 1800 lm 10000h A
RS Stock No. 792-6805
Mfr. Part No.4050300327235
BrandOsram
kr 43,80
Each
Units
Quad Tube 26 W G24q-3 165 mm 3000K - Warm White 89 830 27mm 2 1800 lm 20000h A
RS Stock No. 792-6814
Mfr. Part No.4050300025742
BrandOsram
kr 40,82
Each
Units
Quad Tube 9 W G23 167 mm 3000K - Warm White 89 830 27mm 2 600 lm 10000h A
RS Stock No. 407-5632
Mfr. Part No.18PLC8402PIN
kr 46,79
Each
Units
Quad Tube 18 W G24d-2 150 mm 4000K 100W Cool White 82 840 27mm 2 1200 lm 10000h B
RS Stock No. 472-7715
Mfr. Part No.DDE184
BrandOsram
kr 43,507
Each (In a Pack of 10)
Units
Quad Tube 18 W G24q-2 146 mm 4000K 100W Cool White 80 840 27mm 2 1200 lm 20000h A
RS Stock No. 570-723
Mfr. Part No.18PLC8272PIN
kr 47,69
Each
Units
2D 18 W G24d-2 150 mm 2700K 100W Warm White 82 827 27mm 2 1200 lm 10000h B
RS Stock No. 570-767
Mfr. Part No.18PLC8274PIN
kr 47,82
Each
Units
2D 18 W G24q-2 143 mm 2700K 100W Warm White 82 827 27mm 2 1200 lm 13000h A
RS Stock No. 463-5896
Mfr. Part No.DL1884
BrandOsram
kr 64,074
Each (In a Pack of 10)
Units
Twin Tube 18 W 2G11 225 mm 4000K 100W Cool White 80 840 38mm 1 1200 lm 10000h A
RS Stock No. 407-5698
Mfr. Part No.26PLC8404PIN
kr 59,62
Each
Units
Quad Tube 26 W G24q-3 164 mm 4000K 150W Cool White 82 840 27mm 2 1800 lm 13000h A
RS Stock No. 472-7692
Mfr. Part No.DDE134
BrandOsram
kr 43,377
Each (In a Pack of 10)
Units
Quad Tube 13 W G24q-1 131 mm 4000K 75W Cool White 80 840 27mm 2 900 lm 20000h A