Low-Voltage Deck Lighting
Low-voltage deck lighting is the Handis carpentry-and-wiring service that makes a Seattle deck usable after the sun goes down at 4:15 in November — path lights along the walkways, step-riser lights under each tread, post-cap lights on the corner posts, and rail-mount lights along the guard rail, all on a 12V or 24V landscape-lighting system that does not require a licensed electrician under the NEC Article 411 landscape-lighting exemption. A transformer mounted on the house wall or in a deck bay, direct-burial low-voltage cable run through pre-cut chases in stair risers and post hollows so no wire is visible, LED fixtures rated for wet location with five to ten-year manufacturer warranties (Volt, Kichler, FX Luminaire). One to three working days, from $800 for a basic 4-light step-and-path package on an existing GFCI outlet to $2,500 for a full deck with twelve fixtures including post caps, step risers, and rail mounts. The transformer plugs into an existing GFCI-protected exterior 120V outlet on a 120V circuit. If a new dedicated 120V circuit is needed to power the transformer, that work routes to a licensed Washington L&I electrician and we name them on the quote.
Service
What Low-Voltage Deck Lighting Covers
Low-voltage deck lighting is the Handis service that adds path, step, post-cap, and rail-mount lighting to a deck and the immediate outdoor walkways without a licensed electrician — because the National Electrical Code Article 411 specifically allows landscape-lighting systems at 30V or less (typically 12V or 24V transformer output) to be installed by the homeowner or a general contractor. The 12V or 24V circuit between the transformer and the fixtures is direct-burial cable with no shock hazard; only the 120V circuit feeding the transformer outlet itself is line voltage and requires a licensed electrician if it does not already exist. On a typical Handis low-voltage deck-lighting install we confirm the existing GFCI outlet is functional, mount the transformer, pre-pull the chases through stair risers and post hollows so no wire is visible, install the fixtures with wet-location rated connectors, set the timer or photocell controls, and walk you through the maintenance.
Transformer Sizing and Mount
Transformer sized to the total wattage of the fixtures plus 20 percent headroom for future expansion — typically a 60-watt unit for a basic 4-light install, 150-watt for a standard deck with 8 to 12 fixtures, 300-watt for a large multi-zone install. Major brands we use: Volt, Kichler, FX Luminaire, and Hadco. Transformer mounts on the house wall near the GFCI outlet or in a weather-protected deck bay (under a stair, in an inside corner with a small access door). Magnetic vs solid-state transformer choice depends on the dimming and zone-control preference — we walk through both options on the estimate visit. Transformer plugs into an existing GFCI-protected exterior 120V outlet.
Direct-Burial Low-Voltage Cable Through Hidden Chases
Direct-burial low-voltage cable (typically 12-2 or 10-2 gauge depending on run length) routed through pre-cut chases in stair risers, post hollows, and under-deck framing so no wire is visible on the deck surface. Wire runs from the transformer to each fixture in a hub-and-spoke or daisy-chain layout per the manufacturer's wiring guide. Connection points use wet-location-rated weatherproof connectors (Volt Silicone Filled, Kichler Sealed Connectors, or equivalent) so moisture intrusion is not a failure mode. We test continuity at every connection before closing in the chase.
LED Fixtures Rated for Wet Location
All fixtures are LED, rated for wet-location use per the manufacturer's spec, with five to ten-year manufacturer warranties on the LED chip and the housing. Path lights typically 2-watt to 4-watt LED in a bronze or matte black finish with a hood for glare control. Step-riser lights are recessed into the stair riser face with a low-profile bezel; the LED illuminates the tread surface below without shining in the face of someone climbing the stair. Post-cap lights mount on the top of corner or intermediate posts and provide ambient illumination at the rail. Rail-mount lights install under the top rail and wash the walking surface with a soft downlight. Color temperature is typically 2700K to 3000K (warm white) for residential use — cooler temperatures look industrial in a residential outdoor setting.
Timer and Photocell Controls
The system runs on a transformer-mounted timer (most modern transformers have a built-in 24-hour programmable timer with sunset and sunrise auto-detect via a photocell), so the lights come on at dusk and turn off at dawn or at a programmed time. Multi-zone transformers allow separate scheduling for path lights vs deck lights if you want different schedules. Smart-home integration (Lutron Caséta, Hue, Wi-Fi smart plug between the transformer and the GFCI) is available as an add-on if you want app control or scene integration with the rest of your home automation.
Maintenance Walk-Through
Hand-off includes a walk-through of the system: how to adjust the timer, how to change an LED if one fails (rare in the 10-year manufacturer warranty period), how to clean the fixture lenses (a soft cloth and mild soap, once a year typically), and the location of the transformer for future service. We hand off all manufacturer warranty paperwork and the fixture model numbers so you can order matching replacement fixtures years later if needed.
How the Low-Voltage Deck Lighting Install Works
Five sequential phases from layout to scene set — the actual sequence we run on every low-voltage deck lighting install. Pure Handis service under the NEC landscape-lighting exemption; only a new dedicated 120V circuit (rare) needs a licensed electrician.
Estimate Visit + Fixture Layout + GFCI Confirmation
On the estimate visit we walk the deck at dusk if possible, lay out the fixture count and placement (path lights along walkways, step-riser lights under each tread, post-cap lights on corner posts, rail-mount lights along the guard), select the fixture line (Volt, Kichler, FX Luminaire, Hadco), pick the color temperature (typically 2700K to 3000K for residential warm-white), and confirm the existing GFCI exterior outlet location and functionality. If a new dedicated 120V circuit is needed for the transformer (rare; most decks have an existing GFCI outlet nearby), we name a licensed electrician on the quote.
Transformer Mount + Chase Pre-Pull
Transformer (60W, 150W, or 300W depending on total fixture load) mounted on the house wall near the GFCI outlet or in a weather-protected deck bay. Direct-burial low-voltage cable chases pre-pulled through stair risers, post hollows, and under-deck framing so no wire will be visible on the deck surface. Wire layout follows the manufacturer's hub-and-spoke or daisy-chain guide. Day 1.
Fixture Install + Wet-Location Connectors
Path lights, step-riser lights, post-cap lights, and rail-mount lights installed at the planned locations. Each fixture connects to the low-voltage cable with a wet-location-rated connector (Volt Silicone Filled, Kichler Sealed, or equivalent) so moisture is not a failure mode. Continuity test at every connection before the chase is closed. Day 1 to 2.
Timer Set + Photocell Calibration + Dusk Test
Transformer-mounted timer programmed for sunset-on and sunrise-off (the standard residential schedule), or a custom schedule if you prefer (lights on at dusk, off at 11pm, for example). Photocell calibrated to local sunset. Dusk test on the install day or the next day to confirm the full system fires on at the right time and every fixture is correctly aimed and the color temperature is consistent. Day 2.
Walk-Through + Maintenance Hand-Off + Warranty Paperwork
Walk-through with you covers timer adjustment, LED replacement procedure (rare during the 10-year manufacturer warranty period), fixture lens cleaning (annual), and transformer location for future service. Hand-off of all manufacturer warranty paperwork (Volt or Kichler or FX Luminaire), fixture model numbers for matching replacements, and Handis 1-year project warranty. Day 2 to 3.
Low-Voltage Deck Lighting Pricing
Final pricing depends on the deck footprint, the fixture count and types selected (path lights are less expensive than post-cap lights; rail-mount lights add the most labor), the chase complexity (a deck with no stairs has fewer chase routes than a multi-level deck with two stairs), and the fixture brand selected (mid-tier Volt or Kichler vs premium FX Luminaire or Hadco). Handis self-performs the entire low-voltage portion under the NEC landscape-lighting exemption. If a new 120V circuit is needed for the transformer (rare), that work is by a licensed Washington L&I electrician — typical electrician fee $400 to $800 for a new exterior GFCI circuit. Request a free in-home estimate for an accurate quote.
Tell us the deck and how many evenings you want to use it after dark — we will quote the fixture count and the install so the deck is usable year-round.
Why Homeowners Book Handis for Low-Voltage Deck Lighting
A deck without lighting is a daytime-only deck in Seattle. The sun goes down at 4:15 in November and stays down until 7:30 in January — for four months a year the deck is a dark unusable surface unless you light it. The wrong way to light it is to drag an outdoor extension cord with a $40 string-light setup that trips the GFCI every two weeks and looks like a college dorm. The right way is a real low-voltage landscape-lighting system with fixtures rated for wet location, a transformer sized to the total load, direct-burial cable run through hidden chases, and a timer that fires the lights on at sunset automatically. Handis builds the right way, and we self-perform the install under the NEC landscape-lighting exemption (12V or 24V transformer output is specifically allowed for non-licensed install). One to three working days. From $800 for a basic step-and-path package to $2,500 for a full deck with premium-brand fixtures. The deck becomes usable in November.
Handis self-performs the entire low-voltage install under the NEC landscape-lighting exemption
The National Electrical Code Article 411 specifically allows landscape-lighting systems at 30V or less (typically 12V or 24V transformer output) to be installed by the homeowner or a general contractor — no licensed electrician required for the 12V or 24V side of the system. The 120V circuit feeding the transformer outlet is line voltage and requires a licensed electrician if a new dedicated circuit is needed (rare — most decks already have a GFCI exterior outlet nearby). We tell you on the estimate visit whether a new 120V circuit is needed. If yes we name the licensed electrician on the quote; if no (the common case) the entire install is Handis.
Direct-burial cable through hidden chases — no wire visible on the deck surface
Every low-voltage cable run is direct-burial cable routed through pre-cut chases in stair risers, post hollows, and under-deck framing so no wire is visible on the deck surface. The visible result is a deck that has clean wood and clean fixtures with no wire telegraphing across the surface. Cheap-install crews surface-mount the cable with conduit clips along the rail or down the post — it looks like an industrial conversion. Handis pre-pulls the chase at the framing stage of a new deck, or fishes the chase through existing post hollows and riser cavities on a retrofit install.
LED fixtures rated for wet location with 5 to 10-year manufacturer warranties
Every fixture is LED, rated for wet-location use per the manufacturer's specification, and carries a 5 to 10-year manufacturer warranty on the LED chip and the housing. Brands we use: Volt and Kichler for mid-tier installs (excellent reliability, 5-year warranty, fair price), FX Luminaire and Hadco for premium installs (brass or copper housings, 10-year warranty, premium price). The LED chip life is typically 50,000 hours, which is about 14 years of dusk-to-dawn operation at typical Pacific Northwest day-length variation.
Color temperature 2700K to 3000K — warm white for residential evening atmosphere
Color temperature drives the look-and-feel of the entire system. Warm white (2700K to 3000K) is the right answer for residential outdoor evening atmosphere — it matches the candle-and-firelight aesthetic that people associate with relaxing on a deck after dark. Cool white (4000K and up) looks industrial and harsh in a residential outdoor setting; we never use it for deck lighting. Daylight (5000K and up) is for commercial parking lots, not for a deck. We default to 2700K and adjust to 3000K only if you specifically prefer slightly cooler.
1-year project warranty plus manufacturer fixture warranty
Every Handis low-voltage install carries a 1-year project warranty on the install workmanship — transformer mounting, wire routing, connection integrity, and fixture aiming. If any connection fails or any fixture mis-aims within a year from our install we come back and fix at no charge. The LED fixtures carry the manufacturer's 5 to 10-year warranty on the LED chip and the housing — if a fixture fails within that window we replace under warranty and the only cost is our service-call labor.
Estimate
Tell us the deck (footprint, stair configuration, post layout, board material), the existing exterior GFCI outlet location (if you know it), the fixture preferences (step-riser lights under stair treads, post-cap lights on corner posts, path lights along walkways, rail-mount lights along the guard), the fixture brand preference (Volt or Kichler mid-tier, FX Luminaire or Hadco premium), the color temperature (2700K warm or 3000K slightly cooler), and any smart-home integration (Wi-Fi smart plug, Lutron Caséta). We send back a clear estimate and a one-to-three day timeline.
Customer Reviews
Low-voltage deck lighting reviews from real Seattle-area Handis customers.
Low-voltage path and step lighting on our existing cedar deck. Twelve fixtures total — post caps on the corner posts, step lights under each riser, two path lights along the walkway from the side gate. They ran the wire through pre-cut chases inside the post hollows and under the step risers so nothing is visible. Plugged into the existing GFCI on the back wall of the house. Two days. The deck is finally usable in November when it goes dark at 4:15.
Basic 4-light step and path package on our small Capitol Hill deck. One working day. Handis confirmed the existing GFCI outlet was functional, mounted the 60-watt transformer on the back wall, pre-pulled the chase through the stair riser, and installed 4 Volt path lights along the walkway. Cost came in right at $850. The system fires on at dusk automatically and we have not touched it in fourteen months.
Premium FX Luminaire package with rail-mount lights along the entire guard plus post-cap lights on the corner posts plus step lights under each riser of two stairs. Two and a half working days. The 2700K warm-white color temperature is exactly right — the deck feels intimate after dark rather than commercial. The brass FX Luminaire housings will outlast us; the 10-year manufacturer warranty is more than I expect to need.
I had a low-voltage system installed by a different company three years ago that used cheap brass-plated fixtures and surface-mounted the wire with conduit clips on every post. By year two the brass plating was bubbling and the wire clips had rusted out at the fasteners. Handis replaced the whole system with Volt brass fixtures and pre-pulled the wire through the post hollows. The new install looks intentional, the fixtures will not fail, and the wiring is invisible. The difference is real.
New construction Magnolia deck with the low-voltage lighting installed during the deck build, so all the chases were pulled at framing and there is zero visible wire anywhere. 150-watt transformer in a small under-deck bay, 10 fixtures total including step-risers, post-caps, and a couple of rail-mount accents. The timer is programmed for sunset-on and 11pm-off so the lights are not running all night. Used the deck for the first big family dinner in November and the lighting was perfect.
Frequently Asked Questions
Common questions about low-voltage deck lighting — fixtures, controls, the NEC exemption that lets Handis self-perform, pricing, and what to expect.