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. 848-7610
Mfr. Part No.25658
BrandSylvania
MYR34.286
Each (In a Pack of 10)
units
Twin Tube 36 W 2G11 417 mm 4000K - Cool White 82 840 - 1 2950 lm 16000h A
RS Stock No. 711-7259
Mfr. Part No.25909
BrandSylvania
MYR15.185
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
MYR19.596
Each (In a Pack of 10)
units
2D 16 W GR10q 141 mm 4000K - Cool White 82 840 138mm 1 1050 lm 10000h A
RS Stock No. 711-7265
Mfr. Part No.25913
BrandSylvania
MYR15.185
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. 711-7290
Mfr. Part No.25927
BrandSylvania
MYR17.961
Each (In a Pack of 10)
units
Stick 26 W G24q-3 148 mm 4000K - Cool White 82 840 28mm 1 1800 lm 12000h A
RS Stock No. 811-7768
Mfr. Part No.0025659
BrandSylvania
MYR20.737
Each (In a Pack of 10)
units
Twin Tube 40 W 2G11 539 mm 4000K - Cool White 82 840 - 1 3500 lm 20000h A
RS Stock No. 711-7237
Mfr. Part No.925464
BrandSylvania
MYR21.488
Each (In a Pack of 10)
units
Twin Tube 55 W 2G11 533 mm 4000K - Warm White 85 830 40mm 1 2936 lm 10000h A
RS Stock No. 711-7275
Mfr. Part No.25922
BrandSylvania
MYR15.185
Each (In a Pack of 10)
units
Stick 18 W G24q-2 131 mm 3000K - Warm White 82 830 28mm 1 1200 lm 10000h A
RS Stock No. 800-3735
Mfr. Part No.82174
BrandGE
MYR120.33
Each
units
R80 23 W E27 130 mm 2700K 84W Warm White 80 827 83mm - 580 lm 15000h B
RS Stock No. 711-7281
Mfr. Part No.25926
BrandSylvania
MYR15.185
Each (In a Pack of 10)
units
Stick 18 W G24q-2 131 mm 4000K - Cool White 82 840 28mm 1 1200 lm 10000h A
RS Stock No. 711-7310
Mfr. Part No.27855
BrandSylvania
MYR19.13
Each (In a Pack of 10)
units
U Tube 26 W GX24q-3 131 mm 4000K - Cool White 80 840 49mm 3 1800 lm 15000h A
RS Stock No. 711-7209
Mfr. Part No.25004
BrandSylvania
MYR34.286
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. 711-7243
Mfr. Part No.25890
BrandSylvania
MYR12.57
Each (In a Pack of 10)
units
Stick 9 W G23 165 mm 4000K - Cool White 82 840 28mm 1 600 lm 10000h A
RS Stock No. 711-7206
Mfr. Part No.25003
BrandSylvania
MYR34.286
Each (In a Pack of 10)
units
2D 38 W GR10q 207 mm 3500K - Warm White 82 835 205mm 1 2850 lm 10000h A
RS Stock No. 206-8517
Mfr. Part No.4058075408265
BrandLEDVANCE
MYR110.73
Each
units
Quad Tube 18 W 2G10 215 mm 4000K - Cool White 80 840 17mm - 2500 lm 30000h -
RS Stock No. 827-9239
Mfr. Part No.94521
BrandGE
MYR48.59
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 711-7180
Mfr. Part No.24991
BrandSylvania
MYR19.596
Each (In a Pack of 10)
units
2D 16 W GR10q 141 mm 3500K - Warm White 82 835 138mm 1 1050 lm 10000h A
RS Stock No. 711-7360
Mfr. Part No.24989
BrandSylvania
MYR19.596
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. 711-7287
Mfr. Part No.25925
BrandSylvania
MYR15.185
Each (In a Pack of 10)
units
Stick 13 W G24q-1 118 mm 4000K - Cool White 82 840 28mm 1 900 lm 10000h A
RS Stock No. 711-7186
Mfr. Part No.24947
BrandSylvania
MYR22.858
Each (In a Pack of 10)
units
2D 16 W GR8 141 mm 4000K - Cool White 82 840 138mm 1 1050 lm 10000h B