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. 778-5281
Mfr. Part No.BE 236-2
BrandELT
TWD789.00
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. 789-7933
Mfr. Part No.PCA 2X58 T8 ECO lp
BrandTridonic
TWD1,886.00
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. 781-2936
Mfr. Part No.22185209
BrandTridonic
TWD915.00
Each
units
80 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 775-3972
Mfr. Part No.22185213
BrandTridonic
TWD1,047.00
Each
units
18 W 1 Electronic T8 Fluorescent 220 → 240 V No Yes 230 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 781-2945
Mfr. Part No.22185148
BrandTridonic
TWD973.00
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. 544-355
Mfr. Part No.PVC070SCDM
TWD2,788.00
Each
units
70 W 1 Electronic - Ceramic Metal Halide 220 → 240 V No Yes 109 mm 75 mm 32mm -20°C +45°C -
RS Stock No. 781-2920
Mfr. Part No.22185151
BrandTridonic
TWD940.00
Each
units
39 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 544-339
Mfr. Part No.PVC035SCDM
TWD3,281.00
Each
units
35 W 1 Electronic - Ceramic Metal Halide 220 → 240 V No Yes 109 mm 75 mm 32mm -20°C +45°C -
RS Stock No. 781-2954
Mfr. Part No.22185156
BrandTridonic
TWD996.00
Each
units
54 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 781-2932
Mfr. Part No.22185155
BrandTridonic
TWD940.00
Each
units
54 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 781-2951
Mfr. Part No.22185154
BrandTridonic
TWD996.00
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. 796-1895
BrandRS PRO
TWD1,778.00
Each
units
50 W 1 Electronic - LED 220 → 240 V Yes - 124 mm 79 mm 22mm -25°C +50°C -
RS Stock No. 781-2926
Mfr. Part No.22185149
BrandTridonic
TWD940.00
Each
units
24 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 778-5284
Mfr. Part No.BE 258-2
BrandELT
TWD685.00
Each
units
54 W, 55 W, 58 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. 778-5326
BrandRS PRO
TWD853.00
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. 667-7246
Mfr. Part No.HSA07223221
BrandParmar
TWD1,054.00
Each
units
70 W 1 Electromagnetic - Ceramic Metal Halide, HPS, Metal Halide 230/240 V No - 107 mm 69 mm 59mm 0°C +75°C -
RS Stock No. 775-4007
Mfr. Part No.22176405
BrandTridonic
TWD1,593.00
Each
units
10 W 1, 2 Electronic T4 Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +70°C -
RS Stock No. 781-2939
Mfr. Part No.22185153
BrandTridonic
TWD940.00
Each
units
49 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 778-5313
BrandRS PRO
TWD954.00
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. 778-5329
BrandRS PRO
TWD949.00
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 -