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. 711-7259
Mfr. Part No.25909
BrandSylvania
SGD4.666
Each (In a Pack of 10)
units
Stick 13 W G24d-1 90 mm 3000K - Warm White 82 830 28mm 1 900 lm 10000h A
RS Stock No. 711-7199
Mfr. Part No.24992
BrandSylvania
SGD5.485
Each (In a Pack of 10)
units
2D 16 W GR10q 141 mm 4000K - Cool White 82 840 138mm 1 1050 lm 10000h A
New
RS Stock No. 206-8517
Mfr. Part No.4058075408265
BrandLEDVANCE
SGD29.57
Each
units
Quad Tube 18 W 2G10 215 mm 4000K - Cool White 80 840 17mm - 2500 lm 30000h -
RS Stock No. 711-7360
Mfr. Part No.24989
BrandSylvania
SGD5.485
Each (In a Pack of 10)
units
2D 16 W GR10q 141 mm 2700K - Warm White 82 827 138mm 1 1050 lm 10000h A
RS Stock No. 711-7196
Mfr. Part No.25000
BrandSylvania
SGD9.18
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. 711-7379
Mfr. Part No.24997
BrandSylvania
SGD8.158
Each (In a Pack of 10)
units
2D 28 W GR10q 207 mm 2700K - Warm White 82 827 205mm 1 2050 lm 10000h A
RS Stock No. 711-7186
Mfr. Part No.24947
BrandSylvania
SGD6.399
Each (In a Pack of 10)
units
2D 16 W GR8 141 mm 4000K - Cool White 82 840 138mm 1 1050 lm 10000h B
RS Stock No. 711-7209
Mfr. Part No.25004
BrandSylvania
SGD9.786
Each (In a Pack of 10)
units
2D 38 W GR10q 207 mm 4000K - Cool White 82 840 205mm 1 2850 lm 10000h A
RS Stock No. 711-7192
Mfr. Part No.24999
BrandSylvania
SGD8.819
Each (In a Pack of 10)
units
2D 28 W GR10q 207 mm 3500K - Warm White 82 835 205mm 1 2050 lm 10000h A
RS Stock No. 827-9239
Mfr. Part No.94521
BrandGE
SGD13.603
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 711-7265
Mfr. Part No.25913
BrandSylvania
SGD4.955
Each (In a Pack of 10)
units
Stick 13 W G24d-1 141 mm 4000K - Cool White 82 840 28mm 1 900 lm 10000h A
RS Stock No. 792-6827
Mfr. Part No.4050300279909
BrandOsram
SGD10.96
Each
units
Quad Tube 40 W 2G11 533 mm 4000K - Cool White 89 840 18mm 2 3500 lm 20000h A+