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 adjusts the voltage input to maintain the safe running of the lamp during use. Our range of lighting ballasts includes 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 ballast counteracts this by briefly supplying an initially-high voltage that establishes an arc between the two lamp electrodes when the bulb is turned on, bringing the light to life. Once the arc is established, the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output without overheating or overpowering the bulb, allowing it 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. 243-2869
Mfr. Part No.HFR136TLDII
€38.94
Each
units
36 W - Electronic TLD Fluorescent 220 → 240 V Yes Yes 360 mm 30 mm 22mm +5°C +50°C 1-10V
RS Stock No. 873-5127
Mfr. Part No.QT-ECO 2x5-11/220-240 S square
BrandOsram
€14.02
Each
units
21 W - Electronic CFL Compact Fluorescent 220 → 240 V No Yes 80 mm 40 mm 22mm -15°C +50°C -
RS Stock No. 413-065
Mfr. Part No.HF-P 1 14-35 TL5 HE EII
€19.62
Each
units
14 W, 21 W, 28 W, 35 W - Electronic TL5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 22mm -25°C +60°C -
RS Stock No. 669-2967
Mfr. Part No.794907
BrandOsram
€21.50
Each
units
18 W, 21 W, 16.5 (HF) W, 17 (HF) W, 19 (HF) W - Electronic DD Compact Fluorescent 220 → 240 V No Yes 80 mm 40 mm 22mm -15°C +50°C -
RS Stock No. 243-2904
Mfr. Part No.HFR258TLDII
€54.85
Each
units
58 W - Electronic TLD Fluorescent 220 → 240 V Yes Yes 360 mm 30 mm 22mm +5°C +50°C 1-10V
RS Stock No. 873-5123
Mfr. Part No.QT-ECO 1x18-24/220-240 L long
BrandOsram
€12.49
Each
units
20 W - Electronic CFL Compact Fluorescent 220 → 240 V No Yes 150 mm 22 mm 22mm -15°C +50°C -
RS Stock No. 873-5091
Mfr. Part No.QTP-DL 2x55/220-240 GII
BrandOsram
€25.64
Each
units
55 W - Electronic CFL Compact Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 669-2961
Mfr. Part No.638560
BrandOsram
€21.50
Each
units
18 W, 24 W, 15 (HF) W, 20 (HF) W - Electronic CFL Compact Fluorescent 220 → 240 V No Yes 80 mm 40 mm 22mm -15°C +50°C -
RS Stock No. 781-2939
Mfr. Part No.22185153
BrandTridonic
€35.40
Each
units
49 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 789-7930
Mfr. Part No.PCA 2X36 T8 ECO lp
BrandTridonic
€83.72
Each
units
2 x 36 W - Electronic T8 Fluorescent 220 → 240 V Yes - 360 mm 30 mm 21mm -25°C +70°C DALI
RS Stock No. 775-3994
Mfr. Part No.22185219
BrandTridonic
€43.76
Each
units
18 W - Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C -
RS Stock No. 873-5060
Mfr. Part No.QTP5 2X49/220-240
BrandOsram
€19.24
Each
units
92 W - Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 873-5041
Mfr. Part No.QTP-OPTIMAL 2x54-58
BrandOsram
€19.79
Each
units
54 W - Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C -
RS Stock No. 873-5101
Mfr. Part No.QTP-T/E 1X26-42,2X26/220-240
BrandOsram
€18.46
Each
units
42 W - Electronic CFL Compact Fluorescent 220 → 240 V No - 103 mm 67 mm 31mm -20°C +50°C -
RS Stock No. 873-5088
Mfr. Part No.QTP-M 2X26-32/220-240 S
BrandOsram
€19.47
Each
units
68 W - Electronic CFL Fluorescent 220 → 240 V No - 123 mm 79 mm 33mm -20°C +50°C -
RS Stock No. 781-2967
Mfr. Part No.22185211
BrandTridonic
€35.71
Each
units
14 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 873-5072
Mfr. Part No.QT-FIT5 2X14-35 / 220-240v
BrandOsram
€16.28
Each
units
35 W - Electronic T5 Fluorescent 220 → 240 V No - 280 mm 30 mm 21mm -15°C +50°C -
RS Stock No. 781-2936
Mfr. Part No.22185209
BrandTridonic
€38.64
Each
units
80 W - Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C -
RS Stock No. 544-355
Mfr. Part No.PVC070SCDM
€53.26
Each
units
70 W - Electronic - Ceramic Metal Halide 220 → 240 V No Yes 109 mm 75 mm 32mm -20°C +45°C -
RS Stock No. 781-2960
Mfr. Part No.22185212
BrandTridonic
€44.32
Each
units
24 W - Electronic T5 Fluorescent 220 → 240 V No Yes 360 mm 30 mm 21mm -25°C +60°C -
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