Power your entire outdoor lighting system with Lightkiwi's low voltage landscape lighting transformers — available from 75W to 600W with multi-tap voltage output (12V–22V) to compensate for voltage drop over long runs. All models are weatherproof and feature built-in timer and photocell compatibility for fully automated operation.
How to Choose the Right Landscape Lighting Transformer
The right transformer wattage depends on the total wattage of your lighting fixtures. Add up the wattage of all lights in your system, then choose a transformer rated at least 20–25% higher than that total — this headroom prevents overloading and allows for future expansion. For example, a system with 10 fixtures at 5W each (50W total) needs at minimum a 75W transformer.
What Is Multi-Tap Voltage and Why Does It Matter?
Multi-tap transformers offer multiple voltage output settings (12V, 13V, 14V, and up to 22V depending on the model). This is critical for longer wire runs where voltage drop causes fixtures farther from the transformer to dim. By selecting a higher voltage tap, you compensate for the drop and ensure consistent brightness across your entire system. Lightkiwi transformers offer the widest voltage tap range available — up to 22V — giving you maximum flexibility on large installs.
Built-In Timer & Photocell
All Lightkiwi landscape lighting transformers include a built-in mechanical timer for scheduling on/off times, and are compatible with photocell sensors that automatically turn lights on at dusk and off at dawn. This eliminates the need for separate timer accessories and simplifies installation significantly.
Frequently Asked Questions
What size transformer do I need for landscape lighting?
Add up the total wattage of all your fixtures, then choose a transformer rated 20–25% higher. A 150W transformer works well for most small-to-medium residential systems (up to ~15 fixtures at 8W each). Larger systems with many fixtures or long wire runs should use a 300W or 600W model.
Can I add more lights to my existing transformer?
Yes, as long as the total wattage of all fixtures stays within the transformer's rated capacity (with 20–25% headroom). If you're near the limit, upgrade to the next wattage model or run a second transformer.
What is the difference between 12V and 15V output on a landscape transformer?
The voltage tap setting compensates for voltage drop over long wire runs. Start at 12V for fixtures close to the transformer. For runs over 100ft, switch to a higher tap (13V–15V) to maintain proper brightness at the fixture. Use a multimeter at the fixture to confirm you're getting 10.8V–12V at the bulb.
Are Lightkiwi transformers compatible with LED landscape lights?
Yes. All Lightkiwi low voltage transformers are fully compatible with LED landscape lighting fixtures. LED systems draw significantly less wattage than halogen, so a single transformer can often power a much larger number of LED fixtures.
Do landscape lighting transformers need to be weatherproof?
Yes. Since transformers are mounted outdoors, they must be rated for outdoor/weatherproof use. All Lightkiwi transformers feature a weatherproof enclosure designed for permanent outdoor installation.