210 Meters, Two Layers, Three Occupied Floors
Approx. 210 meters of corridor across three guest floors of a Bordeaux business hotel, retrofitted with the property open: install windows between checkout and check-in, one floor at a time. Two layers — a perimeter cove at ceiling level, a skirting line Approx. 120 mm above the carpet — so walking a guest to their door at 03:00 need not run the cove at check-in brightness.
That idea is right, and it is the part of this hotel corridor led lighting package we changed least. What had to be rebuilt is everything the tender promised around the scene control.
A Corridor That Never Goes Dark Is Not a Dimmer Preset
The tender’s most confident line was a fail-safe hold pattern: if the reception scene control fails, the skirting comes up to Approx. 40% and the cove holds 30%, so the corridor never goes dark — written up as a life-safety line, not a comfort one.
Right instinct, wrong equipment. A corridor that stays lit through a control failure does so because it sits on an emergency circuit with its own standby supply and a test log. A dimming preset holds nothing when what failed is upstream of it, and a driver on the normal supply goes dark with the floor. Escape lighting is a separate scope with its own certificate.
Our own limit is narrower still. Every controller we make is a single-channel RF, IR or touch dimmer — no scene memory, no timeclock, no bus. No reception panel, no 22:30 schedule, no three-floor switch. That layer is the integrator’s, and belongs specified against the emergency scheme rather than beside it. Our supply line ends at DC12V adapters topping out at 96 W, so 24V dimmable drivers are bought locally too.
Which Reels Have to Match, and Which Don’t
CRI 80 SMD on the indirect cove and CRI 90 COB on the direct-view skirting is the right split, for a reason the tender did not give. The cove reaches a guest as a bounce off a painted ceiling face, where no object is judged; the skirting is looked at directly, with carpet and wall colour in the same view. Task decides CRI.
The tender then held both layers “bin-locked to 930, within a 3-step MacAdam ellipse, verified with a handheld colorimeter on commissioning night”. Three problems. “930” is lamp shorthand for Ra grade plus CCT, impossible on a CRI 80 reel. We operate no colorimetry service. And nominal 3000K is not a coordinate — CIE 13.3 defines the CRI calculation and says nothing about how far apart two reels sit.
What matters is which pairs are seen together. Cove and skirting sit Approx. 2.4 m apart vertically, at grazing angles, off different materials; a small step between them is near invisible. Two reels butted end to end in one skirting run read as a single line, and a step there is obvious. Match within a layer — one production run per layer on one PO — and stop asking the layers to agree with each other.
What Went In Per Floor
Two references, one production run each.
| Layer | Model | Spec | Approx. Length | Why this SKU |
|---|---|---|---|---|
| Ceiling perimeter cove | ES-2835-120-8MM | SMD 2835 · 120 LEDs/m · 8 mm · 24V · IP20 · CRI 80 · 3000K | Approx. 70 m per floor | Indirect bounce off the ceiling face, where nothing is inspected and the emitter is never in view. |
| Floor-level skirting wayfinding line | the 480 LEDs/m CRI 90 COB reference | COB · 480 LEDs/m · 8 mm · 24V · IP20 · CRI 90 · 3000K | Approx. 70 m per floor | Direct view at Approx. 120 mm off the carpet: a continuous emitter with no dot pattern, and honest colour on carpet and wallcovering. |
| Profile, drivers and scene control | Aluminium profile and diffuser, 24V dimmable drivers, per-floor driver bays, the reception scene panel and the corridor’s emergency circuit all contractor-supplied to our schedule · our 24V LED strip lights range sets the bus voltage, and nothing in our line schedules, holds a scene or survives a control failure | |||
Each floor is a self-contained Approx. 70 m run off a driver bay in its service closet. At 24V, 70 m single-end is not a run but a fade: percentage drop scales with the square of run length. Reels cap at 20 m, so the reel and dual-end injection set segment length. Nor is aluminium cut in an occupied corridor — we hold no profile line, and strip ships cut to length. Every circuit sits in the SELV band of IEC 61140, which says nothing about sizing a driver to 80% of rated load — a thermal habit worth keeping, not a citation. Both layers are IP20 under IEC 60529, the whole argument for closing the profile before handover.
A hotel corridor genuinely is inside the scope of EN 12464-1 — worth saying, because most strip applications are not. Bright mode targets Approx. 100 lx on the walking surface at U0 of 0.4 or better. The overnight level is not in that standard: it is a design decision about walking safely without waking the guest behind the door, and belongs in the record as one. Jointing detail sits in our install notes.
If You’re Retrofitting an Occupied Corridor
- Put the never-goes-dark duty on the emergency circuit. A dimmer preset cannot survive the failure it claims to cover.
- Match reels within a layer, not between layers. What is seen together in one view is what has to agree.
- Let the reel set the segment, then feed both ends. Above 20 m there is a joint whatever the drawing shows.
- Choose the joint by access, not by a failure rate. Solder the cove that needs scaffolding; push-fit the skirting an electrician can swap in ten minutes — see our hotel corridor LED lighting notes.
Quoting a similar occupied-corridor retrofit? Send us the per-floor corridor length and driver-bay locations and we’ll return a two-layer cut-and-feed schedule with the boundary between our supply and the contractor’s marked on it.
About Senfey
Senfey is a Chinese LED strip manufacturer founded in 2010, running a Shenzhen factory of roughly 12,000 m² with monthly output above 250,000 meters. Our catalog covers COB, SMD, LED Neon Flex, addressable strips and controllers. See Senfey’s hotel lighting hub for corridor and public-area work.
