DEWENWILS HDLT04E 200W Landscape Transformer: features, specs and fit

The DEWENWILS HDLT04E is a low-voltage landscape lighting transformer. It takes household 120V AC power and converts it to 15V DC, which is what many LED garden lights need. It adds a photocell sensor and timer so the lights can come on at dusk and go off on a schedule without you touching them.

What a landscape transformer does

Outdoor path, spot, step and deck lights often run on low voltage rather than mains power. A transformer sits between the outlet and the lights, reducing the voltage to a lower, standard level for the fixtures. DEWENWILS says this unit suits various 12V DC LED lights, including landscape, spot, step, garden, pathway, deck and in-ground lights. The brand notes that it isn't for halogen lights.

The output is 15V rather than 12V. The brand says this compensates for voltage drop along the cable, so the voltage at the far end of a run stays within an acceptable range. Voltage drop is a real effect on long cable runs: the further the light is from the transformer, the more voltage is lost along the wire.

Two independent zones

There are two zones, each rated at 200W maximum, with a total of 200W across both. That means the two zones can't each draw 200W at once. The benefit is that each zone can be set separately, so the front path can follow a different schedule from the back garden. Add up the wattage of the lights on each zone and keep the combined total within 200W.

Five modes

According to DEWENWILS, the five modes are:

• Manual on/off
• Dusk to dawn
• Dusk on, countdown off (after 2, 3, 4, 6 or 8 hours)
• Dusk on, timer off
• Timer on, timer off

A built-in photocell detects daylight, which drives the dusk modes. A clear LED screen and buttons are used for setup, and a memory function keeps the settings after a power outage.

Protection and build

A built-in circuit breaker protects against overload and short circuits when it's connected to 15V DC fixtures. The case is polycarbonate (PC), which DEWENWILS says withstands rain, snow, dust and abrasion. It weighs 5.4 lb (about 2.4 kg) and measures 3.1 x 5.9 x 9.8 inches.

Mounting and connection

The unit has built-in hanging holes. You connect the positive and negative terminals and then hang it with two screws. DEWENWILS recommends mounting it at a height of 12 to 48 inches (0.3 to 1.2 m). A 3.3 ft power cord is attached, so the unit needs to be near a suitable outdoor outlet. For anything beyond plugging in, follow the manual and local electrical codes.

Who it suits

It suits people setting up or upgrading low-voltage garden lighting, such as paths, steps, decks and accent lights, who want automatic dusk control and two separately scheduled areas.

What to check before you buy

• Light type: confirm your fixtures are low-voltage DC LED and rated for the 15V output; it isn't for halogen.
• Total load: add up the wattage on each zone and make sure the total stays within 200W.
• Cable runs: long runs lose voltage, so check cable gauge and length against the lights' requirements.
• Placement: choose a spot within reach of the short cord and the mounting height range, with the photocell able to see daylight.
• Outlet: check the outdoor outlet is suitable and protected, following local codes.
• Manual: read the wiring instructions for the terminals and zones.

The short version

• A 200W landscape transformer converting 120V AC to 15V DC.
• Two zones that can be controlled separately, with 200W total.
• Five modes using a photocell and timer, with memory after power cuts.
• Built-in circuit breaker for overload and short-circuit protection.
• Polycarbonate case, built-in hanging holes and a 3.3 ft cord.

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