Lighting Ballasts

A lighting ballast helps to safely start and operate lamps such as HID and fluorescent lamps. They provide it with the correct voltage for start-up and the running of the lamp.

How do they work?

Without a ballast to limit it is current, within seconds a fluorescent lamp would overheat and burn out. The ballast briefly supplies high voltage to establish an arc between the two lamp electrodes. Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output. For more information on how it works, you can consult our complete Lighting Ballasts Guide.

Types of Ballasts

The most common types of ballasts are magnetic and electronic, and they come in several start technologies to suit different purposes.

  • Magnetic Ballasts – These ballasts are located inside your light sockets between the plug and the light bulb and the power cable. They convert mains electricity into a correct voltage to start, make sure that you always match the wattage of the ballast to the wattage of the lamp.
  • Electronic Ballasts – These ballasts alter the flow of electricity in the light bulb by using a series of induction coils that are separated from one another. They change the frequency of the electrical current without changing the voltage. While magnetic ballasts in fluorescent lamps work at a frequency of 60 Hz, electronic ballasts greatly increase that frequency of 20000 Hz. This high frequency ensures you will not see the lights flickering and will not hear a buzzing sound.


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Description Price Wattage Number of Lamps Ballast Type Supported Lamp Shape Supported Lamp Type Voltage Rating Dimmable High Frequency Length Width Height Minimum Operating Temperature Maximum Operating Temperature Dimming Protocol
RS Stock No. 775-3990
Mfr. Part No.22185218
BrandTridonic
£26.73
Each
Units
58 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +55°C -
RS Stock No. 546-3002
Mfr. Part No.22176408
BrandTridonic
£26.53
Each
Units
18 W, 22 W, 24 W, 26 W, 32 W, 40 W, 42 W 1 Electronic T5c, TC-DEL, TC-F, TC-L, TC-TEL Compact Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +60°C -
RS Stock No. 546-3018
Mfr. Part No.PC 2x26-42 TC PRO
BrandTridonic
£27.52
Each
Units
18 W, 22 W, 24 W, 26 W, 32 W, 42 W 2 Electronic T5c, TC-DEL, TC-F, TC-L, TC-TEL Compact Fluorescent 220 → 240 V No Yes 123 mm 79 mm 31mm -25°C +60°C -
RS Stock No. 424-0224
Mfr. Part No.PC 3/4X18 / 33 COMBO 220-240V
BrandTridonic
£63.11
1 Kit
Kit(s)
18 W 3, 4 Electronic T8 Fluorescent 220 → 240 V No Yes 424 mm 42 mm 28mm 0°C +50°C -
RS Stock No. 775-3997
Mfr. Part No.22185217
BrandTridonic
£26.73
Each
Units
36 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +60°C -
RS Stock No. 775-3984
Mfr. Part No.22185215
BrandTridonic
£22.80
Each
Units
58 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 230 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 440-8076
Mfr. Part No.PC 2X58 / 34 COMBO 220-240V 50
BrandTridonic
£64.61
1 Kit
Kit(s)
58 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 424 mm 42 mm 28mm 0°C +50°C -
RS Stock No. 775-3988
Mfr. Part No.22185216
BrandTridonic
£26.73
Each
Units
18 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 789-7933
Mfr. Part No.PCA 2X58 T8 ECO lp
BrandTridonic
£46.24
Each
Units
2 x 58 W 2 Electronic T8 Fluorescent 220 → 240 V Yes - 425 mm 30 mm 21mm -25°C +55°C DALI
RS Stock No. 775-3994
Mfr. Part No.22185219
BrandTridonic
£27.12
Each
Units
18 W 3 Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 789-7930
Mfr. Part No.PCA 2X36 T8 ECO lp
BrandTridonic
£46.24
Each
Units
2 x 36 W 2 Electronic T8 Fluorescent 220 → 240 V Yes - 360 mm 30 mm 21mm -25°C +70°C DALI
RS Stock No. 440-9603
Mfr. Part No.PCA 4/18 ECO
BrandTridonic
£59.16
Each
Units
18 W 4 Electronic T8 Fluorescent 220 → 240 V Yes Yes 360 mm 40 mm 28mm -25°C +60°C DALI
RS Stock No. 440-8060
Mfr. Part No.PC 2X36 / 33 COMBO 220-240V 50
BrandTridonic
£70.65
1 Kit
Kit(s)
36 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 424 mm 42 mm 28mm 0°C +50°C -
RS Stock No. 781-2951
Mfr. Part No.22185154
BrandTridonic
£21.08
Each
Units
49 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 775-3981
Mfr. Part No.22185214
BrandTridonic
£22.80
Each
Units
36 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 230 mm 30 mm 21mm -25°C +65°C -
RS Stock No. 424-0252
Mfr. Part No.PC 1X58 / 34 COMBO 220-240V 50
BrandTridonic
£78.01
1 Kit
Kit(s)
58 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 424 mm 42 mm 28mm 0°C +50°C -
RS Stock No. 781-2967
Mfr. Part No.22185211
BrandTridonic
£21.08
Each
Units
14 W 3, 4 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 781-2945
Mfr. Part No.22185148
BrandTridonic
£20.51
Each
Units
14 W, 21 W, 28 W, 35 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +75°C -
RS Stock No. 424-0230
Mfr. Part No.PC 1X36 / 33 COMBO 220-240V 50
BrandTridonic
£68.70
1 Kit
Kit(s)
36 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 424 mm 42 mm 28mm 0°C +50°C -
RS Stock No. 781-2954
Mfr. Part No.22185156
BrandTridonic
£21.08
Each
Units
54 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +55°C -