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 Ballast Type Supported Lamp Shape Supported Lamp Type Voltage Rating Dimmable High Frequency Length Width Height Minimum Operating Temperature Maximum Operating Temperature Dimming Protocol EU Energy Efficiency Rating
RS Stock No. 775-3997
Mfr. Part No.22185217
BrandTridonic
SGD66.07
Each
units
36 W Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 28mm -25°C +60°C - A2
RS Stock No. 873-5108
Mfr. Part No.QTP-T/E 1x18, 2x18
BrandOsram
SGD28.61
Each
units
18 W Electronic CFL Compact Fluorescent 220 → 240 V No - 103 mm 67 mm 31mm -20°C +50°C - A2
RS Stock No. 775-3981
Mfr. Part No.22185214
BrandTridonic
SGD59.61
Each
units
36 W Electronic T8 Fluorescent 220 → 240 V No Yes 230 mm 30 mm 21mm -25°C +65°C - A2
RS Stock No. 775-3988
Mfr. Part No.22185216
BrandTridonic
SGD66.07
Each
units
18 W Electronic T8 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +70°C - A2
RS Stock No. 899-7854
Mfr. Part No.HF-P 3/414 TL5 III
SGD46.85
Each
units
- Electronic TL5 Fluorescent 220 → 240 V No Yes 280 mm 39 mm 21mm -25°C +60°C - A2
RS Stock No. 784-0515
Mfr. Part No.7840515-N
BrandParmar
SGD152.23
Each
units
400 W, 450 W Electromagnetic - SON 220 → 240 V No - 150 mm 96 mm 81mm - - - A2
RS Stock No. 789-7930
Mfr. Part No.PCA 2X36 T8 ECO lp
BrandTridonic
SGD130.98
Each
units
2 x 36 W Electronic T8 Fluorescent 220 → 240 V Yes - 360 mm 30 mm 21mm -25°C +70°C DALI A1
RS Stock No. 775-4000
Mfr. Part No.22176407
BrandTridonic
SGD77.32
Each
units
18 W Electronic T4 Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +70°C - A2
RS Stock No. 873-5032
Mfr. Part No.QTP-OPTIMAL 1x54-58
BrandOsram
SGD24.55
Each
units
50 W Electronic T5 Fluorescent 220 → 240 V No - 280 mm 30 mm 21mm -20°C +50°C - A2
RS Stock No. 781-2939
Mfr. Part No.22185153
BrandTridonic
SGD55.38
Each
units
49 W Electronic T5 Fluorescent 220 → 240 V No Yes 280 mm 30 mm 21mm -25°C +60°C - A2
RS Stock No. 778-5329
BrandRS PRO
SGD70.23
Each
units
18 → 36 (T8) W, 24 → 36 (TC-F) W, 24 → 39 (T5 HO) W, 34 → 40 (TC-L) W 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 - A2
RS Stock No. 873-5066
Mfr. Part No.QTP5 2X14-35/220-240
BrandOsram
SGD30.29
Each
units
35 W Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C - A2
RS Stock No. 775-4007
Mfr. Part No.22176405
BrandTridonic
SGD77.32
Each
units
10 W Electronic T4 Fluorescent 220 → 240 V No Yes 103 mm 67 mm 31mm -25°C +70°C - A2
RS Stock No. 873-5085
Mfr. Part No.QTP-M 1X26-42/220-240 S
BrandOsram
SGD36.09
Each
units
46 W Electronic CFL Fluorescent 220 → 240 V No - 103 mm 67 mm 31mm -20°C +50°C - A2
RS Stock No. 873-5035
Mfr. Part No.QTP-OPTIMAL 1x18-40
BrandOsram
SGD25.20
Each
units
40 W Electronic T5 Fluorescent 220 → 240 V No - 280 mm 30 mm 21mm -20°C +50°C - A2
RS Stock No. 796-1909
BrandRS PRO
SGD111.34
Each
units
32 W Electronic - LED 220 → 240 V Yes - 103 mm 67 mm 21mm -25°C +50°C DALI -
RS Stock No. 873-5127
Mfr. Part No.QT-ECO 2x5-11/220-240 S square
BrandOsram
SGD31.60
Each
units
21 W Electronic CFL Compact Fluorescent 220 → 240 V No Yes 80 mm 40 mm 22mm -15°C +50°C - A3
RS Stock No. 873-5038
Mfr. Part No.QTP-OPTIMAL 2x18-40
BrandOsram
SGD31.00
Each
units
40 W Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C - A2
RS Stock No. 778-5284
Mfr. Part No.BE 258-2
BrandELT
SGD37.10
Each
units
54 W, 55 W, 58 W Electronic T5, T8, TC-L Fluorescent 220 → 240 V No Yes 230 mm 40 mm 28mm -20°C +50°C - A2
RS Stock No. 873-5060
Mfr. Part No.QTP5 2X49/220-240
BrandOsram
SGD30.10
Each
units
92 W Electronic T5 Fluorescent 220 → 240 V No - 360 mm 30 mm 21mm -20°C +50°C - A2