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. 787-7501
Mfr. Part No.42PLT8304PINTOP
$14.034
Each (In a Pack of 10)
units
- - - - - - - - - - - - - -
RS Stock No. 792-6842
Mfr. Part No.4050300299037
BrandOsram
$33.92
Each
units
Quad Tube 36 W 2G10 217 mm 4000K - Cool White 89 840 18mm 2 2800 lm 10000h A
RS Stock No. 792-6754
Mfr. Part No.4050300333465
BrandOsram
$16.23
Each
units
Triple Tube 18 W GX24d 124 mm 4000K - Cool White 89 840 49mm 2 1200 lm 10000h B
RS Stock No. 407-5597
Mfr. Part No.9PLS8402PINB
$11.85
Each
units
Twin Tube 9 W G23 167 mm 4000K 60W Cool White 82 840 28mm 1 600 lm 10000h A
RS Stock No. 407-5604
Mfr. Part No.11PLS8402PINB
$11.85
Each
units
Twin Tube 11 W G23 236 mm 4000K 75W Cool White 82 840 28mm 1 900 lm 10000h A
RS Stock No. 463-5868
Mfr. Part No.DDE132
BrandOsram
$7.369
Each (In a Pack of 10)
units
Quad Tube 13 W G24q-1 131 mm 2700K 75W Extra Warm White 80 827 27mm 2 900 lm 10000h A
RS Stock No. 792-6845
Mfr. Part No.4050300816852
BrandOsram
$14.81
Each
units
Twin Tube 16 W GR8 141 mm 2700K - Extra Warm White 89 827 138mm 4 1050 lm 10000h B
RS Stock No. 570-650
Mfr. Part No.11PLS8272PINB
$8.67
Each
units
Twin Tube 11 W G23 236 mm 2700K 75W Warm White 82 827 28mm 1 900 lm 10000h A
RS Stock No. 662-1426
Mfr. Part No.927939083040
$8.44
Each (In a Pack of 10)
units
2D 16 W GR8 141 mm 3000K 16W Warm White 82 830 138mm 1 1050 lm 10000h B
RS Stock No. 792-6849
Mfr. Part No.4050300816838
BrandOsram
$14.81
Each
units
Twin Tube 16 W GR8 141 mm 3500K - Warm White 89 835 138mm 4 1050 lm 10000h B
RS Stock No. 792-6801
Mfr. Part No.4050300327211
BrandOsram
$9.20
Each
units
Quad Tube 18 W G24q-2 146 mm 3000K - Warm White 89 830 27mm 2 1200 lm 20000h A
RS Stock No. 792-6760
Mfr. Part No.4050300342221
BrandOsram
$16.23
Each
units
Triple Tube 18 W GX24q 117 mm 4000K - Cool White 89 840 49mm 2 1200 lm 20000h A
RS Stock No. 472-7973
Mfr. Part No.010625
BrandOsram
$9.265
Each (In a Pack of 10)
units
Quad Tube 13 W G24d-1 138 mm 4000K 75W Cool White 80 840 27mm 2 900 lm 10000h A
RS Stock No. 792-6794
Mfr. Part No.4050300025704
BrandOsram
$7.81
Each
units
Quad Tube 18 W G24d-2 153 mm 3000K - Warm White 89 830 27mm 2 1200 lm 10000h B
RS Stock No. 662-1439
Mfr. Part No.927939183540
$7.942
Each (In a Pack of 10)
units
2D 16 W GR10q 141 mm 3500K 16W Warm White 82 835 138mm 1 1050 lm 12000h A
RS Stock No. 702-5321
Mfr. Part No.26PLC8302PIN
$10.18
Each
units
2D 26 W G24d-3 171 mm 3000K 150W Warm White 82 830 27mm 2 1800 lm 10000h B
RS Stock No. 407-5610
Mfr. Part No.10PLC8402PIN
$7.96
Each
units
Quad Tube 10 W G24d-1 116 mm 4000K 60W Cool White 82 840 27mm 2 600 lm 10000h B
RS Stock No. 463-5874
Mfr. Part No.DDE182
BrandOsram
$7.376
Each (In a Pack of 10)
units
Quad Tube 18 W G24q-2 146 mm 2700K 100W Extra Warm White 80 827 27mm 2 1200 lm 20000h A
RS Stock No. 540-482
Mfr. Part No.927939384040
$12.926
Each (In a Pack of 10)
units
Quad Tube 28 W GR10q 207 mm 4000K 28W Cool White 82 840 205mm 1 2050 lm 12000h A
RS Stock No. 829-3483
BrandRS PRO
$15.08
Each
units
U Tube 13 W - - - - - - - - - - - B