A 300 W transformer is the usual size for a front or back yard of LED fixtures, with room to add lights later. This is where the choice widens most: budget units with a 14 V tap and a full timer cost under $100, smart units add app scheduling and separate zones, and contractor units add four taps, toroidal cores and lifetime warranties.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Full ranking 11
- VOLT Multi-Tap 300W Transformer#1 of 11Full review
A 300 W contractor transformer with four taps, an included photocell timer and a lifetime warranty. The safest long-term pick for a mid-size system.
Amazon $294.97$294.97300 W12 to 15 V ACCountdown - SURAIELEC Wi-Fi 300W ULTW30F01#2 of 11Full review
A low-cost smart 300 W transformer with two zones and a 15 V tap, for an app-scheduled yard on a budget.
Amazon $93.99$93.99300 W12/15 V ACAstronomical - DEWENWILS Wi-Fi 3-Zone 300W HSLT05X#3 of 11Full review
A 300 W smart transformer with three app-controlled zones, for a yard where path, tree and deck lights should run on separate schedules.
Amazon $154.99$154.99300 W12/14 V ACAstronomical - WILAWELS 300W Transformer D12LT06#4 of 11Full review
The cheapest way to 300 W with a 14 V tap and full timer modes, for a budget system.
Amazon $72.99$72.99300 W12/14 V ACClock timer - SUNVIE 2-Zone 300W Transformer#5 of 11Full review
A 300 W two-zone transformer at a budget price, for front and back yards that should switch at different times.
Amazon $119.99$119.99300 W12/14 V ACClock timer - Kichler Smart 300W 15SCT300SS#6 of 11Full review
A smart 300 W transformer with three zones and diagnostics, for a Kichler system you want to manage from a phone.
Amazon $473.47$473.47300 W-App schedule - DEWENWILS Multi-Tap 200W HOSL04B#7 of 11Full review
A 200 W multi-tap transformer for runs of different lengths, at well under contractor prices. Budget for a plug-in timer or photocell.
Amazon $145.99$145.99200 W12 to 15 V ACNone included - DEWENWILS 200W Transformer HOSL04A#8 of 11Full review
A low-cost 200 W transformer for a modest LED system on short runs. It sets up in a minute with no programming.
Amazon $69.99$69.99200 W12 V ACCountdown - Kichler Pro-Contractor 300W 15PC300SS#9 of 11Full review
A 300 W contractor transformer with two 15 V taps, for LED systems with several home runs and a separate controller.
Amazon $254.99$254.99300 W15 V ACNone included - Malibu 300W Power Pack 8100-0300-01#10 of 11Full review
A 300 W Malibu power pack with full timer modes, for a mid-size 12 V system.
Amazon $159.99$159.99300 W12 V ACClock timer - FX Luminaire PX-300 Transformer#11 of 11Full review
A contractor 300 W transformer with four taps and an oversized terminal block, for installers wiring many home runs.
Amazon $395.57$395.57300 W11 to 14 V AC-