Lighting Ballasts

A lighting ballast helps to safely start and operate lighting equipment such as fluorescent or HID lamps. They provide the lamp with the correct voltage at its initial start-up and then adjust the voltage input to maintain the safe running of the lamp during use. Our range of lighting ballasts includes both electronic and electromagnetic products from some of the industry's leading brands, including Osram, Philips Lighting, Tridonic and our own RS PRO.

How do lighting ballasts work?

Without a ballast to limit its current as part of its circuitry, a fluorescent lamp would overheat and burn out within seconds, drastically reducing the bulb's operating life. The lights ballast counteracts this by briefly supplying an initial high voltage that establishes an arc between the lamps two electrodes when the bulb is turned on, bringing the light to life. Once this arc is established, the ballast can then quickly reduce the voltage and is then able to regulate the electrical current to produce a steady and safe light output without overheating or overpowering the bulb. This function allows the bulb to remain lit without issue and therefore extending its performance life. For more information on how it works, you can consult our complete Lighting Ballasts Guide.

Types of Lighting Ballasts

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

  • Magnetic Ballasts - Magnetic 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 - Electronic 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. 778-5281
Mfr. Part No.BE 236-2
BrandELT
TWD798.00
Each
units
18 W, 24 W, 30 W, 36 W, 39 W - Electronic T5, T8, TC-L Fluorescent 220 → 240 V No Yes 230 mm 40 mm 28mm -20°C +50°C -
RS Stock No. 789-7933
Mfr. Part No.PCA 2X58 T8 ECO lp
BrandTridonic
TWD2,901.00
Each
units
2 x 58 W - Electronic T8 Fluorescent 220 → 240 V Yes - 425 mm 30 mm 21mm -25°C +55°C DALI
RS Stock No. 778-5313
BrandRS PRO
TWD1,059.00
Each
units
14 → 35 (T5) W - Electronic T5 Fluorescent 220 → 240 V No Yes 285 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 778-5317
BrandRS PRO
TWD1,292.00
Each
units
14 → 35 (T5) W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 26mm -25°C +60°C -
RS Stock No. 778-5323
BrandRS PRO
TWD1,159.00
Each
units
54 (T5 HO) W, 55 (TC-L) W, 58 (T8) W - 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. 781-2920
Mfr. Part No.22185151
BrandTridonic
TWD1,166.00
Each
units
39 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 781-2939
Mfr. Part No.22185153
BrandTridonic
TWD1,227.00
Each
units
49 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 778-5326
BrandRS PRO
TWD1,078.00
Each
units
18 → 36 (T8) W, 18 → 36 (TC-F) W, 18 → 40 (TC-L) W, 24 and 39 (T5 HO) W - 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. 781-2932
Mfr. Part No.22185155
BrandTridonic
TWD1,227.00
Each
units
54 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 781-2923
Mfr. Part No.22185147
BrandTridonic
TWD1,227.00
Each
units
14 W, 21 W, 28 W, 35 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +80°C -
RS Stock No. 203-5803
Mfr. Part No.UVI/K0027A
TWD4,881.00
Each
units
22.5 W - Electronic Cable - 26.4 V - - 115 mm 43 mm 23mm -30°C +80°C -
RS Stock No. 781-2942
Mfr. Part No.22185152
BrandTridonic
TWD1,318.00
Each
units
39 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 775-4007
Mfr. Part No.22176405
BrandTridonic
TWD1,663.00
Each
units
10 W - Electronic T4 Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +70°C -
RS Stock No. 775-3997
Mfr. Part No.22185217
BrandTridonic
TWD1,421.00
Each
units
36 W - Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +60°C -
RS Stock No. 775-3990
Mfr. Part No.22185218
BrandTridonic
TWD1,421.00
Each
units
58 W - Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +55°C -
RS Stock No. 781-2945
Mfr. Part No.22185148
BrandTridonic
TWD1,275.00
Each
units
14 W, 21 W, 28 W, 35 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +75°C -
RS Stock No. 781-2960
Mfr. Part No.22185212
BrandTridonic
TWD1,536.00
Each
units
24 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 796-1918
BrandRS PRO
TWD2,302.00
Each
units
80 W - Electronic - LED 220 → 240 V Yes - 360 mm 21 mm 30mm -25°C +50°C DALI
RS Stock No. 781-2954
Mfr. Part No.22185156
BrandTridonic
TWD1,318.00
Each
units
54 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 544-349
Mfr. Part No.HID-PV C 070I
TWD1,087.00
Each
units
70 W - Electronic - Ceramic Metal Halide 220 → 240 V No Yes 188 mm 82.7 mm 35mm -20°C +45°C -