CFL Bulbs

CFLs (Compact Fluorescent Lamps) are energy-saving bulbs used in lighting fixtures. The lamp consists of a fluorescent tube which has been made into a shape the same size as a traditional incandescent light bulb.

How does a CFL work?
Compact Fluorescent Bulbs contain gases which are given an electric current. This current creates UV light which excites the gases. 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.
Globe bulbs are spherical shaped.
Spiral bulbs have a fluorescent tube which is shaped into a spiral curve.
Stick bulbs usually consist of multiple tubes which are straight.

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 and the lower the value, the warmer the white. For example, 2700K would be warm white lighting, while 5000K would be cool white lighting.

CFL Bases:
The base of the bulb depicts what fitting it pairs with. CFL lamps usually have a Bayonet or Edison base, in various sizes. Bayonet bases are fitted with a push and twist action, while Edison is a screw in base.

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. Many people are familiar with the appearance of different wattages, so it provides 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. 791-8321
Mfr. Part No.0035012
BrandSylvania
£2.91
Each
Units
Stick 11 W B22 118.5 mm 2700K 48W - 80 827 42mm - 560 lm 8000h A
RS Stock No. 791-8298
Mfr. Part No.0035205
BrandSylvania
£3.43
Each
Units
Spiral 20 W B22 108 mm 2700K 90W - 80 827 55mm - 1250 lm 10000h A
RS Stock No. 800-3735
Mfr. Part No.82174
BrandGE
£16.56
Each
Units
R80 23 W E27 130 mm 2700K 84W Warm White 80 827 83mm - 580 lm 15000h B
RS Stock No. 791-8327
Mfr. Part No.0035002
BrandSylvania
£2.91
Each
Units
Stick 11 W E27 120 mm 2700K 48W - 80 827 42mm - 560 lm 8000h A
RS Stock No. 791-8309
Mfr. Part No.0035222
BrandSylvania
£3.43
Each
Units
Spiral 20 W E27 109 mm 2700K 90W - 80 827 55mm - 1250 lm 10000h A
RS Stock No. 499-097
Mfr. Part No.008838
BrandOrbitec
£8.84
Each
Units
- 15 W BC/B22 135 mm 2700K 75W - - - 65mm - - 8000h A
RS Stock No. 792-6750
Mfr. Part No.4008321986399
BrandOsram
£5.69
Each
Units
Quad Tube 23 W E27 138 mm 4000K 107W Cool White 80 840 56mm - 1520 lm 8000h A
RS Stock No. 791-8337
Mfr. Part No.0035006
BrandSylvania
£3.22
Each
Units
Stick 20 W E27 132.5 mm 2700K 85W - 80 827 48mm - 1160 lm 8000h A
RS Stock No. 811-7147
Mfr. Part No.85640
BrandGE
£4.80
Each
Units
Spiral - E27 100 mm 2700K 58W Warm White 82 827 46mm 1 715 lm 10000h A
RS Stock No. 791-8387
Mfr. Part No.0035307
BrandSylvania
£4.66
Each
Units
Candle 9 W E27 122.5 mm 2700K 40W - 80 827 39mm - 450 lm 10000h A
RS Stock No. 792-6748
Mfr. Part No.4052899912564
BrandOsram
£4.44
Each
Units
Quad Tube 11 W E27 96 mm 4000K 55W Cool White 80 840 - - 660 lm 10000h A
RS Stock No. 212-2455
Mfr. Part No.92246
BrandGE
£38.68
Each
Units
Genura 23 W ES/E27 130 mm 3000K 100W Warm White 82 830 - - 1100 lm 15000h B
RS Stock No. 800-3767
Mfr. Part No.71298
BrandGE
£2.76
Each
Units
Stick 9 W E14 120 mm 2700K 60W Warm White 82 827 44.5mm - 470 lm 10000h A
RS Stock No. 820-8801
Mfr. Part No.009316
BrandOrbitec
£7.82
Each
Units
Oval 9 W B22d 100 mm 4000K 40W - - - 50mm - - - A
RS Stock No. 791-8383
Mfr. Part No.0035301
BrandSylvania
£7.05
Each
Units
Candle 9 W B22 121 mm 2700K 40W - 80 827 39mm - 450 lm 10000h A
RS Stock No. 791-8315
Mfr. Part No.0035208
BrandSylvania
£2.85
Each
Units
Spiral 12 W E14 97.5 mm 2700K 50W - 80 827 45mm - 600 lm 10000h A
RS Stock No. 499-223
Mfr. Part No.008840
BrandOrbitec
£9.07
Each
Units
Candle 11 W SES/E14 138 mm 2700K 60W - - - 42mm - - 6000h A
RS Stock No. 791-8330
Mfr. Part No.0035004
BrandSylvania
£3.12
Each
Units
Stick 15 W E27 133 mm 2700K 64W - 80 827 42mm - 810 lm 8000h A
RS Stock No. 791-8365
Mfr. Part No.0035601
BrandSylvania
£7.34
Each
Units
Globe 20 W E27 139.5 mm 2700K 85W - 80 827 95mm - 1200 lm 10000h A
RS Stock No. 499-188
Mfr. Part No.008833
BrandOrbitec
£8.18
Each
Units
- 11 W E27 120 mm 2700K 60W - - - 58mm - - 8000h A
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