Manufacturer in Gailhan (Gard, France) since 1993
Lighting transformers
Lighting transformers, 12 V or 24 V AC, for halogen lamps, spotlights, floodlights, garden and pool lights: conventional, toroidal or IP68 waterproof, plus LED drivers for LEDs that run on DC. Prices shown online; standard models dispatched from France within 24 to 48 h.
- 12 V · 24 VAC
- 20 VA → 20 kVAdepending on the model
- IP68waterproof models for the garden
- × 1.25the sizing rule
- 100 % tested before shipping
- Shipped within 24 to 48 hours
- Quote within 48 hours
- Secure payment: card, PayPal or bank transfer
Which voltage?
Choose your equipment voltage: only the right models remain.
10 results
Input230 VOutput24 VSingle-phase transformer 230 V / 24 V
Automation, gates, control circuits, 24 V lighting
Choose the ratingfrom €47.42 ex VAT€56.90 inc VAT
4.9 (11 reviews)
Input230 VOutput12 VToroidal transformer 230 V / 12 V
Halogen lamps, 12 V pool lights, 12 V AC equipment
Choose the ratingfrom €36.32 ex VAT€43.58 inc VAT
4.9 (52 reviews)- Input230 VOutput24 V
Toroidal transformer 230 V / 24 V
Low-voltage lighting and 24 V AC equipment
Choose the ratingfrom €36.32 ex VAT€43.58 inc VAT
5.0 (29 reviews) - Input230 VOutput12 V
Single-phase transformer 230 V / 12 V
Halogen lighting, pool lights, 12 V AC equipment
Choose the ratingfrom €47.42 ex VAT€56.90 inc VAT
4.9 (16 reviews) 
Input230 VOutput12 VSealed IP68Garden sealed transformer 230 V / 12 V
Sealed, for 12 V garden lighting and accessories
Choose the ratingfrom €38.22 ex VAT€45.86 inc VAT
4.8 (22 reviews)
Input230 VOutput12 VPool transformer 230 V / 12 V
Standard or toroidal, 300 or 630 VA, for pool lighting
Choose the ratingfrom €61.30 ex VAT€73.56 inc VAT
5.0 (15 reviews)- Input230 VOutput2 × 12 V
Toroidal transformer 230 V / 2 × 12 V
Two 12 V secondary windings
Choose the ratingfrom €36.32 ex VAT€43.58 inc VAT
5.0 (4 reviews) - Input230 / 400 VOutput2 × 12 VDual voltage
Single-phase transformer 230-400 V / 2 × 12 V
230 V or 400 V primary, two 12 V secondaries
Choose the ratingfrom €47.42 ex VAT€56.90 inc VAT
Input230 V ACOutput12 V DC12 V DC LED power supply
Electronic power supply for LED lighting
Choose the ratingfrom €49.13 ex VAT€58.96 inc VAT
Inputyour choiceOutputyour choiceYour voltage is not listed?
Single-phase or three-phase, we wind it to order in Gailhan: send your voltages and rating, quote within 48 hours.
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No product matches these criteria.
Price excluding VAT for the lowest-priced version; the price of each version is shown on the product page.
How to choose: Lighting Transformers
Transformer or LED driver?
Halogen lamps and lamps marked “12 V AC”: a transformer. LED strips and spotlights marked “12 V DC”: an LED driver.
AC or DCWhich rating?
Add up the power of the lamps, multiply by 1.25 and choose the next rating up: 300 W of halogen lamps needs a 400 VA transformer.
The calculationGarden or pool?
For the garden, an IP68 waterproof transformer; for pool lights, a transformer installed in the plant room.
Garden and pool
Custom-built
Can’t find your voltage or rating?
We wind your custom transformer in our Gailhan workshop: input voltage, output voltage, rating, protection.
Good to know
Our lighting transformers
Halogen lamps, many spotlights and pool lights run on extra-low voltage, 12 or 24 V AC: a lighting transformer steps the 230 V mains down to that voltage. Here is our selection for lighting, with a price shown for every rating:
- 12 V lighting transformer (230 V to 12 V) and 230 V to 24 V transformer, from 63 VA to 20 kVA, open frame, covered or sealed (IP54): for larger lighting installations.
- 230 V / 12 V toroidal transformer and 230 V / 24 V toroidal transformer: compact and quiet, for a light fitting or an enclosure where space is tight.
- 230 V / 2 × 12 V toroidal transformer and 230/400 V to 2 × 12 V transformer: for two 12 V lighting circuits.
- IP68 waterproof 230 V / 12 V transformer from the Garden Family range, from 20 to 400 VA: for garden lighting.
- Pool light transformer, 230 V / 12 V, 300 or 630 VA: for swimming pool lights.
- 230 V / 12 V LED driver, also called an LED power supply, from 35 to 100 W: for LED strips and LED spotlights running on 12 V DC.
Transformer or LED driver: AC or DC?
Before choosing a light transformer, check whether your lamps run on AC or DC. A transformer delivers alternating current (AC). It suits halogen lamps, which is why it is often called a halogen transformer, as well as lamps marked “12 V AC”, “12 V ~” or “AC/DC”.
LED strips and many LED spotlights need a regulated 12 or 24 V direct current (DC) supply: they need an LED driver, not a transformer. The lamp's marking or instructions will tell you which.
Sizing a lighting transformer
Add up the power of all the lamps the transformer supplies, multiply by 1.25 and choose the next rating up. A 300 W halogen floodlight needs 375 VA, so a 400 VA transformer; two 30 W LED floodlights need a 100 VA one. With LED lamps running on 12 V AC, go by the power marked on each lamp.
Outdoor, garden and pool lighting
Our garden lighting transformer, the IP68 waterproof model from the Garden Family range, supplies 12 V spotlights, bollards and other 12 V lighting outdoors.
For swimming pool lighting, 12 V AC pool lights are supplied by a transformer installed outside zones 0, 1 and 2 of the pool, for example in the plant room. The installation must comply with IEC 60364-7-702 (NF C 15-100 in France) and be carried out or checked by an electrician. See our garden and pool transformers.
Cable, protection and installation
- Cable: at 12 V the current is high. Over a long run, work out the cable size to limit the voltage drop, otherwise the lamps will be dimmer.
- Protection: on the 230 V side, an aM fuse or a type D circuit breaker for a conventional transformer; a time-lag fuse (T) or a type D circuit breaker for a toroidal transformer.
- Location: an open-frame transformer or a toroid goes in an enclosure or cabinet, in a dry, ventilated place, as it gets warm in normal operation.
Manufacturing and delivery
Our conventional and toroidal transformers are wound and 100 % tested in our workshop in Gailhan, in the Gard (southern France), where we have been making transformers since 1993. Both carry a 2-year warranty. Standard models are dispatched from France within 24 to 48 hours.
Electricians and lighting designers: a trade account shows prices excluding VAT, with an immediate 5 % discount. For another voltage, see the custom-built transformer and our toroidal transformers.
Frequently asked questions
What does a lighting transformer do?
It steps the 230 V mains down to extra-low voltage, 12 or 24 V AC, which is what halogen lamps, many spotlights and pool lights run on.
Which transformer do I need for 12 V halogen lamps?
A 12 V halogen transformer, from 230 V to 12 V AC, conventional or toroidal. Its rating is the power of the lamps multiplied by 1.25, rounded up to the next rating: 300 W of lamps needs a 400 VA transformer.
Can I use a 12 V transformer for LED lights?
Only for LED lamps marked “12 V AC” or “AC/DC”. LED strips and spotlights marked “12 V DC” need an LED driver, which supplies direct current.
What is the difference between a transformer and an LED driver?
A transformer steps the voltage down and delivers alternating current. An LED driver delivers regulated direct current, which is what LED strips and many LED spotlights need.
Which transformer should I use for garden lighting?
For outdoor installation, an IP68 waterproof transformer, such as the 230 V / 12 V model from the Garden Family range, from 20 to 400 VA. Its rating is chosen in the same way: the power of the lamps × 1.25.
Which transformer do I need for pool lights?
A 230 V / 12 V transformer for 12 V AC pool lights, installed outside zones 0, 1 and 2 of the pool, for example in the plant room. The installation must comply with IEC 60364-7-702 (NF C 15-100 in France).
Why are my lights dimmer at the end of a long cable run?
At 12 V the current is high and the voltage drop in the cable builds up quickly: over a long run, use a larger cable size or move the transformer closer to the lamps.
How much does a light transformer cost?
It depends on the rating and the version. Each product page shows the price of every rating and every version, and a trade account shows prices excluding VAT, with a 5 % discount.