Should I choose 12V or 24V?
Both are common, and neither is better in the abstract. At the same power, 24V draws less current, which usually allows longer runs before voltage drop becomes visible and permits thinner conductors. 12V remains useful in short runs and vehicle or furniture work. Whichever you choose, strip and driver must share it. The comparison sits in 12V vs 24V LED strip lights.
Where can I cut an LED strip?
Only at the cut marks printed on the tape. Cut between them and the circuit is broken, so that segment stays dark. The spacing between marks varies by product, and some strips are engineered to be cut at much shorter intervals than others, so read the cut interval for the exact item. Details in our guide to LED strip cut points.
How bright should the strip be?
Compare lumens per foot, not watts, since watts describe consumption. Accent lighting in a bedroom or a cove wants far less output than a kitchen work surface or a garage bench. Viewing distance, wall color and any diffuser change the result too. Start with choosing LED strip brightness.
What CRI should I look for?
CRI describes how faithfully a light source renders color against a reference. Higher figures matter most where color judgment matters: kitchens, wardrobes, bathrooms, workshops, display. The published figure is per product, so check it on the page rather than assuming a whole category. Our article on what CRI means explains how to read it.
Can LED strips be dimmed?
Some can, in the right combination. Dimming belongs to the whole chain: the strip, the driver, the dimmer or controller and the protocol between them. Non dimmable drivers exist by design, and putting a phase cut wall dimmer and a smart low voltage controller onto the same circuit is not something to attempt unless both sets of documentation permit it. Confirm compatibility, minimum and maximum load included, then test the real hardware before closing up. See dimming a single color strip.
What IP rating do I need for a bathroom or outdoors?
That depends on actual exposure at the position, and the answer has to be an exact rating rather than the word waterproof. IP20 is dry interior only. Higher ratings such as IP65 or IP67 describe defined levels of protection. The rating on the tape also covers the tape alone: cut ends, connectors, the driver enclosure and the mounting each have to suit the location, and local code applies outdoors and near water. Compare them in IP20 vs IP65 vs IP67.
How long can one run be?
Every strip publishes a maximum run length, and it exists because current has to travel through the tape's copper. Past that length the far end dims. Longer walls are handled by feeding from both ends, injecting power, or splitting into separate runs that return to the driver in parallel rather than being chained. Read the figure per product. Our guide to maximum run length covers the fixes.
Do I need an aluminum channel?
Not always, though there are good reasons to use one. A channel helps dissipate heat away from the tape, protects it, finishes the edge, and with a diffuser it reduces the visibility of individual dots without guaranteeing they disappear, since density, depth and lens all play a part. In enclosed positions the thermal case is strongest. More in why use an aluminum channel.
Can I join two strips together?
Often, yes. Plenty of strips are designed to be shortened at their printed marks and rejoined, either with a compatible connector or by soldering, and which of those applies is a per product answer. The two pieces have to share voltage, polarity and pad layout, and the joint needs mechanical support so it is not carrying strain. Our guide to cutting and reconnecting a strip shows both methods.
