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. 721-0853
BrandRS PRO
£10.92
Each
Units
1 x 14 → 18 W, 1 x 18 → 24 W, 1 x 22 W, 1 x 24 W 1 Electronic T5, T8, TC-F, TC-L, T-R5 Compact Fluorescent, Fluorescent 220 → 240 V No Yes 80 mm 41 mm 18mm -15°C +55°C -
RS Stock No. 721-0841
BrandRS PRO
£10.18
Each
Units
1 x 10 W, 1 x 10 → 16 W, 1 x 16 W, 1 x 4 → 14 W, 1 x 5 → 11 W 1 Electronic T5, T8, TC-D/E, TC-DD, TC-S/E Compact Fluorescent, Fluorescent 220 → 240 V No Yes 80 mm 41 mm 18mm -15°C +55°C -
RS Stock No. 778-5329
BrandRS PRO
£26.87
Each
Units
18 → 36 (T8) W, 24 → 36 (TC-F) W, 24 → 39 (T5 HO) W, 34 → 40 (TC-L) W 2 Electronic T5 HO, T8, TC-F, TC-L Compact Fluorescent, Fluorescent 220 → 240 V No Yes 360 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 778-5326
BrandRS PRO
£23.93
Each
Units
18 → 36 (T8) W, 18 → 36 (TC-F) W, 18 → 40 (TC-L) W, 24 and 39 (T5 HO) W 1 Electronic T5 HO, T8, TC-F, TC-L Compact Fluorescent, Fluorescent 220 → 240 V No Yes 285 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 778-5323
BrandRS PRO
£25.72
Each
Units
54 (T5 HO) W, 55 (TC-L) W, 58 (T8) W 1 Electronic T5 HO, T8, TC-L Compact Fluorescent, Fluorescent 220 → 240 V No Yes 285 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 721-0850
BrandRS PRO
£10.92
Each
Units
4 → 16 (Fluorescent) W, 5 → 16 (CFL) W 1 Electronic T5, T8, TC-D/E, TC-DD, TC-S/E Compact Fluorescent, Fluorescent 220 → 240 V No Yes 150 mm 22 mm 19mm -15°C +55°C -
RS Stock No. 721-0857
BrandRS PRO
£11.97
Each
Units
14 → 24 (Fluorescent) W, 18 → 24 (CFL) W 1 Electronic T5, T8, TC-F, TC-L, T-R5 Compact Fluorescent, Fluorescent 220 → 240 V No Yes 150 mm 22 mm 19mm -15°C +55°C -
RS Stock No. 778-5317
BrandRS PRO
£28.68
Each
Units
14 → 35 (T5) W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 778-5313
BrandRS PRO
£23.50
Each
Units
14 → 35 (T5) W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 285 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 796-1898
BrandRS PRO
£41.63
Each
Units
80 W 1 Electronic - LED 220 → 240 V Yes - 280 mm 21 mm 30mm -25°C +50°C -
RS Stock No. 796-1909
BrandRS PRO
£54.74
Each
Units
32 W 1 Electronic - LED 220 → 240 V Yes - 103 mm 67 mm 21mm -25°C +50°C DALI
RS Stock No. 796-1895
BrandRS PRO
£50.03
Each
Units
50 W 1 Electronic - LED 220 → 240 V Yes - 124 mm 79 mm 22mm -25°C +50°C -
RS Stock No. 796-1918
BrandRS PRO
£42.38
Each
Units
80 W 1 Electronic - LED 220 → 240 V Yes - 360 mm 21 mm 30mm -25°C +50°C DALI
RS Stock No. 775-3990
Mfr. Part No.22185218
BrandTridonic
£31.54
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
£36.91
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. 413-055
Mfr. Part No.HF-P 2 14-35 TL5 HE EII
£17.88
Each
Units
14 W, 21 W, 28 W, 35 W 2 Electronic TL5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 22mm -25°C +60°C -
RS Stock No. 546-3018
Mfr. Part No.PC 2x26-42 TC PRO
BrandTridonic
£38.34
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
£72.83
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. 778-5281
Mfr. Part No.BE 236-2
BrandELT
£17.71
Each
Units
18 W, 24 W, 30 W, 36 W, 39 W 1, 2 Electronic T5, T8, TC-L Fluorescent 220 → 240 V No Yes 230 mm 40 mm 28mm -20°C +50°C -
RS Stock No. 775-3997
Mfr. Part No.22185217
BrandTridonic
£31.54
Each
Units
36 W 2 Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +60°C -
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