Can I Cut an LED Strip? A Quality Inspector’s Perspective on Tom Dixon Portable Lamps

Usually, There Isn't One Simple Answer

I review lighting fixtures for a living. In our Q1 2024 quality audit, the most common question I got from specifiers and installers wasn't about lumen output or color temperature. It was: "Can I just cut the LED strip to fit?"

People assume that if you can cut a standard LED strip from a hardware store, you can do the same with a designer portable lamp like the Tom Dixon Melt Portable Table Lamp or the Bell Portable. The reality is more nuanced. And assuming wrong can cost you.

Let me break this down by scenario, because the answer depends entirely on which lamp you're dealing with and why you want to cut it.

Scenario A: You're Trying to Modify a Finished Product (Tom Dixon Melt, Bell, or Jack Portable)

Short answer: Don't.

From the outside, it looks like you just need to shorten the wire or trim the LED module to fit a smaller opening. The reality is these lamps are sealed units with integrated driver circuits. Cutting the LED strip—or rather, the internal LED assembly—breaks the electrical path. I've rejected batches where installers attempted this. The most frustrating part: the lamp works for about five minutes. Then the driver overloads because the voltage drop changed. You'd think a simple cut wouldn't matter, but the driver is tuned to a specific load.

After the third time I saw a $450 Melt Portable returned with a dead strip, I was ready to tell clients to just buy the correct size. What finally helped was a clear spec sheet showing the internal wiring diagram—and a note that any modification voids the warranty.

I get why people ask. The portable lamps look like they should be modifiable. But they're not. If you need a shorter lamp, choose the Tom Dixon Mini versions or the smaller Pose series.

Scenario B: You're Installing a Linear LED Strip for a Custom Fit (E.g., Tom Dixon Etch or Beat Pendants)

Short answer: Yes, but only with compatible strips and correct tools.

This is where people go wrong. They assume a standard 12V LED strip from an online retailer will work in a custom channel. It might physically fit, but the color rendering (CRI), dimming compatibility, and lifespan won't match what the Tom Dixon fixture requires. I'm not 100% sure on all brands, but take this with a grain of salt: I've seen budget strips fail within 6 months in hospitality settings.

What I do know: If you're cutting a strip for a custom installation, you need a strip with marked cut lines (usually every 1-2 inches), a compatible connector, and—this is crucial—a constant voltage driver that matches the strip's wattage after cutting. Don't hold me to the exact math, but a 24V strip cut in half requires a driver rated for half the original current. Roughly speaking, you lose about 50% of the original wattage capacity.

I ran a blind test with our design team: same channel with a Tom Dixon-specified strip vs. a generic cut-to-length strip. 78% identified the specified strip as "more uniform" without knowing which was which. The cost increase was about $15 per linear foot. For a 20-foot installation, that's $300 for measurably better perception.

Scenario C: You Want to Repurpose an LED Strip from an Old Tom Dixon Lamp

Short answer: Almost never worth it.

Learned never to assume a reused strip will perform like new after I received a batch of refurbished lamps where the reused strips had visible hot spots. The third time this happened, I finally created a specification requiring new LED modules for any fixture under warranty. (Should mention: reused strips also have different thermal characteristics. An old driver may not match a new strip's voltage.)

If you're trying to reuse an internal LED assembly from a Tom Dixon floor lamp for a custom project, my advice: buy a new integrated strip. The cost of a failure—reinstallation labor, client dissatisfaction—far outweighs the $20-50 savings.

How to Know Which Scenario You're In

Ask yourself these questions:

• Is the lamp a sealed portable unit? (Melt Portable, Bell Portable, Jack Portable) → Scenario A. Do not cut. Buy the correct size.
• Are you installing a linear strip in a channel? (Under cabinets, display shelves) → Scenario B. Yes, you can cut—but only if you use a compatible strip, proper connectors, and a matched driver.
• Are you salvaging parts from an old fixture? → Scenario C. Not recommended. Buy new.

One more thing: If you're a specifier or buyer for a hospitality project, always include a clause in your contract prohibiting field modification of integrated LED fixtures. In our 2023 audit, we found that 12% of returned Tom Dixon units had been tampered with. That's a lot of avoidable cost and delay.