The middle band, roughly 30 to 60 inches off the floor
This is the working level, under a wall cabinet, along a vanity or above a desk. The useful distinction is that the middle band is the only one specified against a measured plane: you set it by the level landing on the counter, a figure you can meter, while the other two are judged by eye.
Its failure mode is reflection rather than direct glare. A polished counter or mirrored splashback turns a horizontal run into a bright line aimed at a standing eye, and moving the tape an inch either way usually kills it. It should also not run alone at night, because a lit counter under a dark ceiling reads as a stage.
The high band at the ceiling plane
A cove, an uplit shelf top or a run above tall cabinets makes the ceiling the brightest surface, and everything below picks up the bounce, so it lifts general level more than its own output suggests. Detailing the trough belongs to the guide to building an architectural cove.
What it must not do is show its own construction. Scallops on the ceiling, emitters visible from across the room, or a hard bright edge at the fascia all announce the trick. Setback and fascia height fix all three, and both change with ceiling height. A taller fascia raises the cutoff and pulls the wash in closer to the wall; a shallower one lets the light run further out and shows more of the trough.
Setting the three bands against each other
Layering light at three heights fails at the ratios more often than the mounting, and equal output in all three produces a flat room. Pick which band leads, then step the other two down far enough that the difference survives a photograph. The test costs nothing: shoot the room with the camera locked to manual, convert to grayscale, and see whether the bands separate.
Which band leads is a room decision: a kitchen usually leads with the middle band, a stair with the low band. What each layer is for is set out in what the ambient, task and accent layers each do. A height is not a layer, though: a low run under a stair nosing is doing task work, and a high run aimed at one beam is an accent, so the bands and the layers cross rather than line up. Treat any ratio you read as a starting point to mock up.
Switching and wiring when you are layering light at three heights
Three bands want three separately switched zones, so the control device needs at least three usable outputs. Take channel count, current per channel and dimming behavior from the makers' published data for those units. Two items each carrying a dimmable label still settle nothing about the pair wired together.
Nothing in the stack changes voltage. Tape rated 24V wants a 24V driver and any controller rated 24V, and tape rated 12V wants 12V for both. Each constant-voltage run travels back to the driver in parallel, and none is chained into the next, which is set out in why constant-voltage runs go back in parallel. Take the installed footage across the three bands, multiply by the watts per foot printed for that product, then specify a unit whose stated output clears the answer by 20 percent or more, verifying the headroom guidance first.
Warmth is normal at the tape and the driver alike. Dropping a run into an aluminum channel helps dissipate heat and squares the edge of each band, though nothing obliges you to fit one. A channel reduces but does not guarantee an end to dotting, with channel or profile depth, diffuser type and LED density carrying the remainder. Sections for a toe kick, a shelf underside and a cove are rarely the same part; the profiles grouped by mounting type sort that out. Beam angle, connector fit and cut spacing are per-product facts.
Low-voltage familiarity gives nobody permission at 120V. A hardwired driver, the junction box it terminates in, the box behind a wall dimmer or switch, and the in-wall cable feeding them are line-voltage connections, so a licensed electrician does that part, following NEC requirements where they govern, local electrical code, and the printed manufacturer instructions, and shutting the breaker off and testing the circuit dead before opening anything. Sketch the three heights and send it over with the ceiling height marked.
