Light the Whole Perimeter or Only Where It Reads?

Two lit sides can be the stronger design

Plenty of rooms read better with light on two sides. In an L shaped plan, one leg turns away and is never seen with the other. In a galley kitchen, the soffit above the tall units sits above eye level and contributes little you can see. A fireplace wall or a full height bookcase already reads as a solid mass, and running light across it evenly can flatten the thing you wanted to notice.

There is also a compositional argument. Light on every surface gives the eye nowhere to settle. Leaving one plane darker sets up a contrast that puts the emphasis where you want it, which the layering guide works through in more depth. One suitable option for a low output perimeter accent is the LEDClub 24V COB 200 Series (verify the published lumens per foot and watts per foot on the product page). Rooms in the living room collection show both approaches side by side.

A break is either architecture or an error

Some places already carry an edge. The face of a beam, the return where a soffit meets a wall, a bulkhead over a doorway, the step where a ceiling plane changes height. Light that stops at one of those looks deliberate, because the building already stops there. Put the same break in the middle of a flat 14 foot wall and everyone finds it.

So bring the last emitter and the end of the extrusion to the same architectural line. A lens carrying on past the final emitter picks up spill and glows faintly, turning a clean stop into a smudge, so trim the lens and cap it where the light ends.

If the run has to stop mid wall, put something in front of the stop. A drapery pocket, a shelf return, the head of a door casing. The stop is still there, but the eye has been given a reason for it.

Power planning follows the choice to light the whole perimeter or only where it reads

Load follows installed footage, so this is not a decision you make after the driver arrives. Multiply the published watts per foot by the length that genuinely goes up, then leave current headroom above that, at least 20 percent as it stands (verify both figures on the product page), and choose a supply rated past the result. Trimming 22 feet down to 13 late in the job leaves a supply carrying far less than it was picked for, so check whether it publishes a minimum load.

Where the perimeter runs in more than one length, each length gets its own pair of conductors back to the supply and the lengths sit in parallel, never chained one behind another in series, with the total inside the driver's rating. Keep one voltage across the chain: a 24V strip needs a 24V supply and 24V control gear, and a 12V strip needs 12V at every stage. If a hardwired supply, a junction box or any line voltage connection is involved, that portion is for a licensed electrician working under the NEC, local code and the manufacturer instructions, with the circuit dead before a cover comes off and no probing of a live connection.