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. 784-0515
Mfr. Part No.7840515-N
BrandParmar
$128.44
Each
units
400 W, 450 W - Electromagnetic - SON 220 → 240 V No - 150 mm 96 mm 81mm - - -
RS Stock No. 775-3988
Mfr. Part No.22185216
BrandTridonic
$88.33
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. 667-7246
Mfr. Part No.HSA07223221
BrandParmar
$62.38
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. 667-7252
Mfr. Part No.HSA25223221-N
BrandParmar
$88.23
Each
units
250 W 1 Electromagnetic - Ceramic Metal Halide, HPS, Metal Halide 230/240 V No - 167 mm 87 mm 72mm 0°C +75°C -
RS Stock No. 775-3990
Mfr. Part No.22185218
BrandTridonic
$79.67
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. 781-2926
Mfr. Part No.22185149
BrandTridonic
$48.11
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. 781-2954
Mfr. Part No.22185156
BrandTridonic
$68.93
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. 775-3997
Mfr. Part No.22185217
BrandTridonic
$77.59
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. 873-5038
Mfr. Part No.QTP-OPTIMAL 2x18-40
BrandOsram
$28.59
Each
units
40 W 2 Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 775-3981
Mfr. Part No.22185214
BrandTridonic
$69.05
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. 781-2923
Mfr. Part No.22185147
BrandTridonic
$69.04
Each
units
14 W, 21 W, 28 W, 35 W 1 Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +80°C -
RS Stock No. 796-1898
BrandRS PRO
$98.08
Each
units
80 W 1 Electronic - LED 220 → 240 V Yes - 280 mm 21 mm 30mm -25°C +50°C -
RS Stock No. 781-2958
Mfr. Part No.22185210
BrandTridonic
$68.84
Each
units
80 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 425 mm 30 mm 21mm -25°C +55°C -
RS Stock No. 781-2945
Mfr. Part No.22185148
BrandTridonic
$74.51
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. 781-2936
Mfr. Part No.22185209
BrandTridonic
$70.02
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. 873-5066
Mfr. Part No.QTP5 2X14-35/220-240
BrandOsram
$27.63
Each
units
35 W 2 Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 796-1909
BrandRS PRO
$128.95
Each
units
32 W 1 Electronic - LED 220 → 240 V Yes - 103 mm 67 mm 21mm -25°C +50°C DALI
RS Stock No. 781-2967
Mfr. Part No.22185211
BrandTridonic
$64.71
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. 796-1895
BrandRS PRO
$110.03
Each
units
50 W 1 Electronic - LED 220 → 240 V Yes - 124 mm 79 mm 22mm -25°C +50°C -
RS Stock No. 781-2942
Mfr. Part No.22185152
BrandTridonic
$68.93
Each
units
39 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
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