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. 792-6754
Mfr. Part No.4050300333465
BrandOsram
$15.11
Each
units
Triple Tube 18 W GX24d 124 mm 4000K - Cool White 89 840 49mm 2 1200 lm 10000h B
RS Stock No. 829-3483
BrandRS PRO
$14.12
Each
units
U Tube 13 W - - - - - - - - - - - B
RS Stock No. 570-622
Mfr. Part No.5PLS8272PINB
$8.13
Each
units
Twin Tube 5 W G23 105 mm 2700K 25W Warm White 82 827 28mm 1 250 lm 10000h B
RS Stock No. 780-6240
Mfr. Part No.41171
BrandGE
$10.849
Each (In a Pack of 25)
units
Stick 40 W 2G11 539 mm 3000K - Warm White 82 830 44mm - 3500 lm 22500h A
RS Stock No. 407-5648
Mfr. Part No.26PLC8402PIN
$9.48
Each
units
Quad Tube 26 W G24d-3 171 mm 4000K 150W Cool White 82 840 27mm 2 1800 lm 10000h B
RS Stock No. 570-694
Mfr. Part No.11PLS8274PINB
$9.25
Each
units
Twin Tube 11 W 2G7 220 mm 2700K 75W Warm White 82 827 28mm 1 900 lm 13000h A
RS Stock No. 702-5318
Mfr. Part No.13PLC8302PIN
$6.71
Each
units
2D 13 W G24d-1 138 mm 3000K 75W Warm White 82 830 27mm 2 900 lm 10000h A
RS Stock No. 472-7721
Mfr. Part No.DDE264
BrandOsram
$8.785
Each (In a Pack of 10)
units
Quad Tube 26 W G24q-3 165 mm 4000K 150W Cool White 80 840 27mm 2 1800 lm 20000h A
RS Stock No. 212-2455
Mfr. Part No.92246
BrandGE
$85.91
Each
units
Genura 23 W ES/E27 130 mm 3000K 100W Warm White 82 830 - - 1100 lm 15000h B
RS Stock No. 792-6814
Mfr. Part No.4050300025742
BrandOsram
$6.80
Each
units
Quad Tube 9 W G23 167 mm 3000K - Warm White 89 830 27mm 2 600 lm 10000h A
RS Stock No. 206-8517
Mfr. Part No.4058075408265
BrandLEDVANCE
$31.55
Each
units
Quad Tube 18 W 2G10 215 mm 4000K - Cool White 80 840 17mm - 2500 lm 30000h -
RS Stock No. 702-5337
Mfr. Part No.18PLC8304PIN
$8.58
Each
units
2D 18 W G24q-2 143 mm 3000K 100W Warm White 82 830 27mm 2 1200 lm 13000h B
RS Stock No. 702-5396
Mfr. Part No.16PLQ8272PIN
$8.521
Each (In a Pack of 10)
units
2D 16 W GR8 141 mm 2700K 16W Warm White 82 827 138mm 1 1050 lm 10000h B
RS Stock No. 702-5422
Mfr. Part No.38PLQ8404PIN
$16.649
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. 570-587
Mfr. Part No.18PLL840
$16.92
Each
units
Twin Tube 18 W 2G11 227 mm 4000K 100W Cool White 82 840 38mm 1 1200 lm 20000h A
RS Stock No. 792-6827
Mfr. Part No.4050300279909
BrandOsram
$13.94
Each
units
Quad Tube 40 W 2G11 533 mm 4000K - Cool White 89 840 18mm 2 3500 lm 20000h A+
RS Stock No. 792-6849
Mfr. Part No.4050300816838
BrandOsram
$13.79
Each
units
Twin Tube 16 W GR8 141 mm 3500K - Warm White 89 835 138mm 4 1050 lm 10000h B
RS Stock No. 702-5371
Mfr. Part No.18PLT8404PINCS
$10.12
Each
units
Six Tube 18 W GX24q-2 112 mm 4000K 100W Cool White 82 840 41mm 3 1200 lm 13000h B
RS Stock No. 792-6788
Mfr. Part No.4050300425641
BrandOsram
$15.05
Each
units
Triple Tube 42 W GX24q 169 mm 3000K - Warm White 89 830 49mm 2 3200 lm 20000h A
RS Stock No. 792-6776
Mfr. Part No.4050300348582
BrandOsram
$15.05
Each
units
Triple Tube 32 W GX24q 148 mm 3000K - Warm White 89 830 49mm 2 2400 lm 20000h A