3 Wire Tunable White LED Strip

It's simpler than it looks. You have three wires because you're controlling two separate channels of LEDs. One wire is the common positive (+24V, for example). The other two are the negatives: one for the warm white LEDs (WW) and one for the cool white LEDs (CW). Your tunable white controller sends power down the WW wire to make it warmer, the CW wire to make it cooler, or both to blend them. You can't wire this directly to power; you must use a CCT controller.

For most residential runs under 10 meters, 18 AWG wire is perfectly fine. 14 gauge is usually overkill unless you have a very long, high-power commercial installation. The key is matching the wire gauge to the current (Amps) and the distance to prevent voltage drop. A short under-cabinet run might only need 20 AWG, while a 15-meter architectural run might need 16 AWG. If you give us your total length and strip wattage, we can calculate the exact wire you need.

For perfect, reflection-free dimmable kitchen lights, you have to use a channel. Don't stick the bare strip directly to the underside of the cabinet. A shallow aluminum channel with a frosted diffuser will blend the light, kill the glare on your stone countertops, and protect the strip from cooking grease and steam. We have dozens of aluminum channels designed for this exact purpose, including corner-mount options that aim the light back toward the backsplash.

Yes, we stock several. The 8mm PCB width is a common choice for fitting inside slim profiles or narrow architectural details. Just be aware that on a narrower board, heat dissipation is a bit more critical. For a high-output 8mm led white strip, mounting it inside an aluminum channel isn't just for looks—it's essential for pulling heat away from the LEDs and ensuring a long life.

This is a classic trap. While the white wire is often the common positive on many strips, there is no universal standard. I've seen it used for the cool white negative, too. Don't guess. The correct function is always printed right on the strip's circuit board next to the solder pads, usually as '+', 'WW', and 'CW'. Always trust the PCB markings, not the wire color.

On our standard density 24V strips, you can expect a solid 10 meters (about 33 feet) on a single power feed with no noticeable voltage drop. For anything longer, you have two options: power the strip from both ends or use one of our specialized long-run strips. We have 24V and 48V constant-current models designed specifically to go 20, 30, or even 40 meters with perfectly even brightness from start to finish. We cover this in detail in our guide to long run strips.

The strip itself doesn't speak Zigbee, but the controller can. You just need to pair our 3-wire tunable white strip with a Zigbee CCT controller. That controller acts as the bridge. It joins your Zigbee network (like Philips Hue or Amazon Echo Plus) and then translates the commands from your app or hub into the PWM signals the strip understands. We stock a wide range of CCT controllers for almost any smart home protocol.

Yes, absolutely. A huge part of our business is building custom-length assemblies that are ready to install right out of the box. Just send us a sketch or a simple list of lengths. We'll cut the strips to your exact measurements, solder on your specified length and type of lead wire, and can even pre-attach connectors. An engineer will send you back a complete wiring diagram and quote, usually within the same business day, with no fee or obligation to order. Much of what we ship is built to a customer's drawing.

We sell our professional-grade strips by the reel, typically 5 or 10 meters, because that's how contractors and designers need to buy them. However, every strip has clearly marked cut points, usually every 25mm to 100mm (1 to 4 inches). This means you can easily cut a perfect 4ft LED strip, or any other exact length you need, with just a pair of scissors. It gives you far more precision than being stuck with fixed-length sections.

Forget all the complex diagrams for a minute. Just think of the flow: Wall outlet -> Power Supply (this converts AC to low-voltage DC) -> CCT Controller (this is the brain) -> LED Strip (this makes the light). That's the chain. Your power supply plugs into the controller's input, and the three wires from the LED strip connect to the controller's output. Match the +, WW, and CW markings, and you're 90% of the way there. Start with a small test piece on a table before you install it in the ceiling.