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Puck Lights

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Puck Lights by Power Source: Pick the Wiring Before the Fixture

The fixture is the easy choice. What determines how puck lights install, dim, and hold up over time is the power source, and that decision comes first. Millwork installers and remodelers work across four approaches, each with different wiring, dimming, and rework implications.

Power SourceWiringDimmingBest For
120V hardwiredDirect to the branch circuit, no driverWall dimmer; confirm the dimming type the fixture supportsPermanent installs in kitchens, retail, and hospitality
12V or 24V driver-fedLow-voltage runs daisy-chained from a Class 2 driverThrough the driver; dimming method depends on the driver specDisplay cases, millwork packages, multi-puck runs
Plug-inCord and wire harness to a receptacleInline or plug-in dimmer where supportedDisplay environments that get reconfigured often
Battery operated puck lightsNoneUsually step dimming on the fixtureSpots with no power access; not suited to daily task duty

For permanent commercial work, hardwired and driver-fed configurations are what get specified. Battery powered puck lights solve a real problem in closets and rental spaces, but battery replacement cycles make them the wrong answer for a display case that runs ten hours a day.

Driver Sizing for Multi-Puck Runs

Low-voltage LED puck lights on a shared driver need simple arithmetic done up front. Total the fixture wattage, then add headroom of about 20 percent so the driver is not running at its ceiling. Six 3-watt pucks total 18 watts; with headroom that calls for a driver of at least 22 watts, so a standard 24-watt Class 2 driver fits. Match the driver's output voltage to the pucks (12V and 24V systems do not mix), and keep low-voltage wire runs short and adequately gauged, since undersized runs show up as visible dimming at the far end of the chain. If the run needs to dim, the driver is what makes that possible, so choose a dimmable driver whose method matches the control you plan to use.

Recessed or Surface Mounting into Cabinet Stock

Most puck light models install either way, but the cabinet stock decides which one you want. Recessed mounting drops the puck flush into a drilled cutout for the cleanest look; check the spec sheet for the cutout diameter and the depth clearance behind the panel before drilling, and confirm the panel is thick enough to leave material around the hole. Surface mounting sits the puck proud of the panel with a trim ring, the practical choice on thin shelf stock or where drilling through a finished face is not an option.

Beam and color specs matter as much as mounting on display work. Typical puck beam angles run narrow to medium, roughly 15 to 40 degrees, which is what makes them accent fixtures rather than area lighting. For merchandise, food service counters, and any surface where color accuracy sells the product, specify high-CRI models, and match color temperature to the setting: 2700K warm accenting for upscale retail, 3500K to 4000K for task surfaces and commercial casework.

Related Task and Accent Categories

For continuous linear accent light instead of point sources, see tape lighting. For linear task bars beneath wall cabinets, see under cabinet light bars. The full task and accent lighting category covers the complete range.

Frequently Asked Questions

For permanent installations, hardwired or driver-fed pucks win on reliability, dimming control, and zero battery maintenance. Battery operated puck lights fit spaces with no wiring access, rentals, and short-duty uses like occasional display cabinets. If the light will run daily, wire it; changing batteries across a dozen pucks gets old fast, and output drops as the cells drain.

Yes, and the path depends on the power source. Line-voltage pucks dim from a compatible wall dimmer, low-voltage pucks dim through a dimmable driver, and battery models usually offer step dimming on the fixture itself. Always confirm the dimming method on the spec sheet.

It varies by model, so drill to the cutout diameter on the spec sheet rather than a rule of thumb. Also verify the depth clearance behind the panel, since shallow cabinet tops can rule out recessed mounting in favor of surface trim rings.

Divide the driver's rated wattage by the per-puck wattage, then leave about 20 percent headroom. A 24-watt driver comfortably feeds six 3-watt pucks. The fixture documentation lists the maximum linkable count where the harness itself is the limit. Running a driver at its full rating shortens its life, so the headroom is not optional.

Mount pucks toward the front third of the cabinet bottom so the light lands on the counter work zone instead of the backsplash. Keep spacing even, roughly one puck per cabinet door, so the pools of light read as intentional rather than random. In display shelving, center each puck over the item it is meant to highlight.

Spaced correctly, yes. LED puck lights deliver usable task light on counters and workbenches with far less heat than the halogen pucks they replaced. Where a long run needs perfectly even light with no scalloping, a linear under cabinet fixture or tape light is the better tool. Many projects mix the two: linear fixtures over work zones, pucks for accent.