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. 407-5581
Mfr. Part No.7PLS8402PINB
PHP293.49
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Twin Tube 7 W G23 135 mm 4000K 40W Cool White 82 840 28mm 1 400 lm 10000h B
RS Stock No. 702-5371
Mfr. Part No.18PLT8404PINCS
PHP370.62
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. 407-5604
Mfr. Part No.11PLS8402PINB
PHP329.91
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Twin Tube 11 W G23 236 mm 4000K 75W Cool White 82 840 28mm 1 900 lm 10000h A
RS Stock No. 407-5632
Mfr. Part No.18PLC8402PIN
PHP265.83
Each
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Quad Tube 18 W G24d-2 150 mm 4000K 100W Cool White 82 840 27mm 2 1200 lm 10000h B
RS Stock No. 570-571
Mfr. Part No.40PLL830
PHP381.94
Each
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Twin Tube 40 W 2G11 542 mm 3000K 290W Warm White 82 830 38mm 1 3500 lm 20000h A
RS Stock No. 789-9790
Mfr. Part No.0025882
BrandSylvania
PHP189.45
Each
units
Stick 9 W G23 168 mm 2700K - Extra Warm White 80 827 33mm - 600 lm 10000h A
RS Stock No. 570-638
Mfr. Part No.7PLS8272PINB
PHP283.23
Each
units
Twin Tube 7 W G23 135 mm 2700K 40W Warm White 82 827 28mm 1 400 lm 10000h B
RS Stock No. 570-767
Mfr. Part No.18PLC8274PIN
PHP277.07
Each
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2D 18 W G24q-2 143 mm 2700K 100W Warm White 82 827 27mm 2 1200 lm 13000h A
RS Stock No. 407-5626
Mfr. Part No.13PLC8402PIN
PHP245.70
Each
units
Quad Tube 13 W G24d-1 138 mm 4000K 75W Cool White 82 840 27mm 2 900 lm 10000h A
RS Stock No. 792-6839
Mfr. Part No.4050300295879
BrandOsram
PHP425.48
Each
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Quad Tube 55 W 2G11 535 mm 4000K - Cool White 89 840 18mm 2 4800 lm 20000h A+
RS Stock No. 792-6817
Mfr. Part No.4050300025759
BrandOsram
PHP236.82
Each
units
Quad Tube 11 W G23 237 mm 3000K - Warm White 89 830 27mm 2 900 lm 10000h A
RS Stock No. 463-6164
Mfr. Part No.4050300011462
BrandOsram
PHP251.419
Each (In a Pack of 10)
units
Quad Tube 18 W G24d-2 153 mm 2700K 100W Extra Warm White 80 827 27mm 2 1200 lm 10000h B
RS Stock No. 792-6801
Mfr. Part No.4050300327211
BrandOsram
PHP253.39
Each
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Quad Tube 18 W G24q-2 146 mm 3000K - Warm White 89 830 27mm 2 1200 lm 20000h A
RS Stock No. 792-6823
Mfr. Part No.4050300010793
BrandOsram
PHP418.37
Each
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Quad Tube 36 W 2G11 411 mm 3000K - Warm White 89 830 17.5mm 2 2900 lm 20000h A
RS Stock No. 787-7670
Mfr. Part No.32PLT8404PINCS
BrandPhilips
PHP318.458
Each (In a Pack of 10)
units
Quad Tube 32 W GX24q-3 123 mm 4000K 32W Cool White 82 840 41mm - 2400 lm 13000h B
RS Stock No. 792-6820
Mfr. Part No.4050300010762
BrandOsram
PHP375.56
Each
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Quad Tube 24 W 2G11 317 mm 3000K - Warm White 89 830 18mm 2 1800 lm 20000h A
RS Stock No. 711-7253
Mfr. Part No.25910
BrandSylvania
PHP165.784
Each (In a Pack of 10)
units
Stick 18 W G24d-2 90 mm 3000K - Warm White 82 830 28mm 1 1200 lm 10000h A
RS Stock No. 570-717
Mfr. Part No.13PLC8272PIN
PHP271.15
Each
units
2D 13 W G24d-1 138 mm 2700K 75W Warm White 82 827 27mm 2 900 lm 10000h A
RS Stock No. 792-6763
Mfr. Part No.4050300342047
BrandOsram
PHP526.52
Each
units
Triple Tube 26 W GX24d 139 mm 4000K - Cool White 89 840 49mm 2 1800 lm 10000h A
RS Stock No. 570-644
Mfr. Part No.9PLS8272PINB
PHP283.23
Each
units
Twin Tube 9 W G23 167 mm 2700K 60W Warm White 82 827 28mm 1 600 lm 10000h A