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
$50.66
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
$64.14
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. 784-0515
Mfr. Part No.7840515-N
BrandParmar
$77.15
Each
units
400 W, 450 W - Electromagnetic - SON 220 → 240 V No - 150 mm 96 mm 81mm - - -
RS Stock No. 789-7930
Mfr. Part No.PCA 2X36 T8 ECO lp
BrandTridonic
$54.70
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. 873-5038
Mfr. Part No.QTP-OPTIMAL 2x18-40
BrandOsram
$25.76
Each
units
40 W 2 Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 781-2945
Mfr. Part No.22185148
BrandTridonic
$61.57
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. 873-5127
Mfr. Part No.QT-ECO 2x5-11/220-240 S square
BrandOsram
$24.14
Each
units
21 W 2 Electronic CFL Compact Fluorescent 220 → 240 V No Yes 80 mm 40 mm 22mm -15°C +50°C -
RS Stock No. 873-5035
Mfr. Part No.QTP-OPTIMAL 1x18-40
BrandOsram
$19.86
Each
units
40 W 1 Electronic T5 Fluorescent 220 → 240 V No - 280 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 781-2942
Mfr. Part No.22185152
BrandTridonic
$58.46
Each
units
39 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 775-3990
Mfr. Part No.22185218
BrandTridonic
$66.84
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. 781-2948
Mfr. Part No.22185150
BrandTridonic
$34.09
Each
units
24 W 2 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 775-4000
Mfr. Part No.22176407
BrandTridonic
$71.25
Each
units
18 W 1, 2 Electronic T4 Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +70°C -
RS Stock No. 775-3988
Mfr. Part No.22185216
BrandTridonic
$74.15
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. 796-1909
BrandRS PRO
$72.24
Each
units
32 W 1 Electronic - LED 220 → 240 V Yes - 103 mm 67 mm 21mm -25°C +50°C DALI
RS Stock No. 775-3981
Mfr. Part No.22185214
BrandTridonic
$36.89
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. 667-7246
Mfr. Part No.HSA07223221
BrandParmar
$49.34
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. 789-7933
Mfr. Part No.PCA 2X58 T8 ECO lp
BrandTridonic
$56.67
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. 873-5123
Mfr. Part No.QT-ECO 1x18-24/220-240 L long
BrandOsram
$17.04
Each
units
20 W 1 Electronic CFL Compact Fluorescent 220 → 240 V No Yes 150 mm 22 mm 22mm -15°C +50°C -
RS Stock No. 781-2960
Mfr. Part No.22185212
BrandTridonic
$66.41
Each
units
24 W 3, 4 Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 781-2923
Mfr. Part No.22185147
BrandTridonic
$57.02
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 -
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