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庫存編號 792-6842
製造零件編號4050300299037
BrandOsram
HK$168.88
單位
Quad Tube 36 W 2G10 217 mm 4000K - Cool White 89 840 18mm 2 2800 lm 10000h A
RS庫存編號 407-5597
製造零件編號9PLS8402PINB
HK$44.57
單位
Twin Tube 9 W G23 167 mm 4000K 60W Cool White 82 840 28mm 1 600 lm 10000h A
RS庫存編號 570-694
製造零件編號11PLS8274PINB
HK$43.47
單位
Twin Tube 11 W 2G7 220 mm 2700K 75W Warm White 82 827 28mm 1 900 lm 13000h A
RS庫存編號 570-650
製造零件編號11PLS8272PINB
HK$43.47
單位
Twin Tube 11 W G23 236 mm 2700K 75W Warm White 82 827 28mm 1 900 lm 10000h A
RS庫存編號 407-5604
製造零件編號11PLS8402PINB
HK$45.04
單位
Twin Tube 11 W G23 236 mm 4000K 75W Cool White 82 840 28mm 1 900 lm 10000h A
RS庫存編號 407-5676
製造零件編號18PLC8404PIN
HK$51.15
單位
Quad Tube 18 W G24q-2 143 mm 4000K 100W Cool White 82 840 27mm 2 1200 lm 13000h A
RS庫存編號 792-6839
製造零件編號4050300295879
BrandOsram
HK$65.30
單位
Quad Tube 55 W 2G11 535 mm 4000K - Cool White 89 840 18mm 2 4800 lm 20000h A+
RS庫存編號 463-5919
製造零件編號4050300010786
BrandOsram
HK$75.737
/個 (每包:10個)
單位
Twin Tube 36 W 2G11 415 mm 4000K 240W Cool White 80 840 38mm 1 2900 lm 10000h A
RS庫存編號 711-7281
製造零件編號25926
BrandSylvania
HK$25.32
/個 (每包:10個)
單位
Stick 18 W G24q-2 131 mm 4000K - Cool White 82 840 28mm 1 1200 lm 10000h A
RS庫存編號 570-767
製造零件編號18PLC8274PIN
HK$42.52
單位
2D 18 W G24q-2 143 mm 2700K 100W Warm White 82 827 27mm 2 1200 lm 13000h A
RS庫存編號 570-723
製造零件編號18PLC8272PIN
HK$41.61
單位
2D 18 W G24d-2 150 mm 2700K 100W Warm White 82 827 27mm 2 1200 lm 10000h B
RS庫存編號 792-6823
製造零件編號4050300010793
BrandOsram
HK$64.21
單位
Quad Tube 36 W 2G11 411 mm 3000K - Warm White 89 830 17.5mm 2 2900 lm 20000h A
RS庫存編號 570-717
製造零件編號13PLC8272PIN
HK$55.52
單位
2D 13 W G24d-1 138 mm 2700K 75W Warm White 82 827 27mm 2 900 lm 10000h A
RS庫存編號 792-6814
製造零件編號4050300025742
BrandOsram
HK$36.34
單位
Quad Tube 9 W G23 167 mm 3000K - Warm White 89 830 27mm 2 600 lm 10000h A
RS庫存編號 792-6820
製造零件編號4050300010762
BrandOsram
HK$56.94
單位
Quad Tube 24 W 2G11 317 mm 3000K - Warm White 89 830 18mm 2 1800 lm 20000h A
RS庫存編號 792-6763
製造零件編號4050300342047
BrandOsram
HK$80.81
單位
Triple Tube 26 W GX24d 139 mm 4000K - Cool White 89 840 49mm 2 1800 lm 10000h A
RS庫存編號 791-8321
製造零件編號0035012
BrandSylvania
HK$38.40
單位
Stick 11 W B22 118.5 mm 2700K 48W - 80 827 42mm - 560 lm 8000h A
RS庫存編號 570-543
製造零件編號18PLL830
HK$60.60
單位
Twin Tube 18 W 2G11 227 mm 3000K 100W Warm White 82 830 38mm 1 1200 lm 20000h A
RS庫存編號 792-6833
製造零件編號4050300299051
BrandOsram
HK$168.88
單位
Quad Tube 36 W 2G10 217 mm 3000K - Warm White 89 830 18mm 2 2800 lm 10000h A
RS庫存編號 463-6170
製造零件編號DD2682
BrandOsram
HK$43.518
/個 (每包:10個)
單位
Quad Tube 26 W G24d-3 172 mm 2700K 150W Extra Warm White 80 827 27mm 2 1800 lm 10000h A