Question 1

What are the key specifications of 9677-PU?

Accepted Answer

9677-PU: 2110, 350 LEDs/m, 24V, 4mm PCB, 3oz copper FPCB, cuttable 7LEDs/20mm. Full photometric data, wiring diagrams and test reports are available in the downloads section of this page.

Question 2

How long can a single run of this ultra narrow LED strip be?

Accepted Answer

Maximum single run for this model is 5M. Feeding from both ends or using a mid-point tap halves the effective distance per segment, so a ultra narrow LED strip can cover twice that length on one circuit when wired accordingly.

Question 3

Can DENO customise this ultra narrow LED strip for a project?

Accepted Answer

Yes. DENO manufactures the Ultra-Narrow SMD Strips series as an OEM and ODM supplier: reel length, colour temperature, CRI grade, PCB width, waterproofing and private labelling can all be specified. Request a quote for lead time and project pricing.

Question 4

What makes an LED strip marine grade?

Accepted Answer

Marine LED strip lights need IP67 or IP68 encapsulation, salt-mist resistant coating, tinned copper conductors and UV stable silicone. These boat LED strip lights are built for continuous saltwater spray and vibration rather than the light splash duty a standard waterproof strip is rated for.

Question 5

How narrow can a thin LED strip be?

Accepted Answer

DENO builds down to a 3 mm wide FPCB. A 3 mm LED strip fits aluminium channels, cabinet reveals, shelf edges and slim architectural slots where an 8 or 10 mm board cannot be hidden, while still carrying 2 oz copper for stable long runs.

Question 6

What counts as a high density LED strip?

Accepted Answer

Anything above roughly 120 LEDs per metre is normally sold as a high density LED strip. DENO builds high-density boards from 240 up to 700 LEDs/m, which puts the LED pitch between 4.2 mm and 1.4 mm — tight enough to read as a continuous line behind a shallow diffuser instead of a row of dots.

Question 7

Is a 24V high density LED strip better than 12V?

Accepted Answer

For dense boards, yes in most cases. A 24V high density LED strip draws half the current of a 12V board at the same wattage, so voltage drop is far lower and single runs of 5–10 m stay even in brightness. DENO supplies 12V, 24V, 48V and mains-voltage versions of the same high-density layout; 12V is normally reserved for short cabinet runs or low-voltage furniture requirements.

Question 8

Do you make a 5V high density LED strip?

Accepted Answer

Yes. 5V dense LED tape is built for USB-powered displays, shelving and addressable pixel projects where the controller is 5V-native. Because 5V boards lose voltage quickly, DENO limits standard runs to 1–2 m per feed, uses 2 oz or 35+70 μm copper, and adds per-segment constant-current ICs so the far end does not dim.

Question 9

Can a high density RGB LED strip stay dot-free?

Accepted Answer

It can, but the pitch has to be tighter than a white board because each RGB package mixes three separate dies. DENO's high density RGB and RGBW builds place emitters at 2.1 mm–4.2 mm pitch so colour mixing completes within a few millimetres of the diffuser, which removes both the dot pattern and the rainbow fringing seen on standard 60 LEDs/m RGB tape.

Question 10

What is a high density addressable LED strip used for?

Accepted Answer

High density addressable LED strip (pixel tape) is used for signage, media facades, stair effects and studio lighting where each LED or short segment must be controlled individually. DENO offers addressable builds with up to 700 pixels per metre in SPI protocols such as WS2812B, WS2815 and SK6812, with breakout points every cut unit for reliable data injection on long runs.

Question 11

What makes the best high density LED strip lights?

Accepted Answer

Density alone is not enough. The best high density LED strip lights combine tight LED pitch with a 3-SDCM binning window, Ra 90+ (Ra 95+ for full-spectrum), 2 oz or heavier copper for thermal spreading, flicker-free constant-current drive and an FPCB rated for repeated bending. DENO ships photometric data, LM-80 chip data and a full test report with every OEM order so specifiers can verify these claims instead of trusting a datasheet number.

Question 12

How dense can an ultra high density LED strip go?

Accepted Answer

DENO's ultra high density LED strip tops out at 700 LEDs per metre with a 1.4 mm pitch, drawing up to 30 W/m. Beyond that point a discrete SMD layout stops making sense thermally, and a SCOB (COB) emitter is the better route to a fully dotless line.

Question 13

Can I order a custom high density LED strip?

Accepted Answer

Yes — LED count, pitch, CCT, CRI, PCB width from 3 mm, copper weight, cut unit and IP rating are all configurable on a custom high density LED strip. DENO is a manufacturer, not a reseller, so a non-standard density or a mixed-CCT dense board can be tooled from an existing FPCB stack-up without a new production line.

Question 14

Is high density LED tape the same as a high density LED strip?

Accepted Answer

They are the same product under two names: “high density led tape” is the common UK/EU term for what North America calls a high density LED strip. DENO ships the identical dense FPCB boards to both markets — 240 to 700 LEDs/m, 3 mm to 12 mm widths, CE/UL/RoHS documentation — so the tape you specify in a UK cove detail is the same board as the strip specified in a US one.

Question 15

Which dense LED tape suits under-cabinet lighting?

Accepted Answer

For under-cabinet work choose a dense board at 240–420 LEDs/m in a 5 mm to 8 mm width, 12V or 24V, with a short cut unit so the board matches each cabinet run exactly. At that density a 10 mm deep aluminium channel with a frosted diffuser already reads dot-free at normal worktop viewing distance.

Question 16

What power supply do I need for a dense LED strip run?

Accepted Answer

Size the driver from the board wattage: multiply the W/m figure on the datasheet by the run length, then add 20–30 % headroom, so a 20 W/m board over 5 m needs a 100 W load on a 120–130 W constant-voltage driver. Match the driver voltage exactly (24V board, 24V driver), keep it constant-voltage rather than constant-current unless the board carries its own CC ICs, and check that the dimming protocol — TRIAC, 0–10V, DALI or PWM — is supported on both sides before ordering.

Question 17

Does more LEDs per metre mean a brighter strip?

Accepted Answer

Not on its own. Brightness is lumens per metre, which is drive current times die count times efficacy — doubling the LED count while halving the current per die gives the same output with a smoother line, not twice the light. Read lm/m and W/m together: DENO dense boards run 8–24 W/m and 700–2600 lm/m, so pick the density for dot-free appearance and the wattage for the light level you actually need.

Question 18

Can dense LED tape run on 36V or 48V supplies?

Accepted Answer

Yes. 36V and 48V builds exist specifically for long uninterrupted runs: at 48V the same wattage draws a quarter of the current of a 12V board, so a single feed can cover 15–20 m with even brightness and far fewer injection points. They need a matching SELV driver and, in most territories, the same low-voltage installation rules as 24V; DENO supplies 36V and 48V versions of the standard dense layouts on request.

Question 19

How narrow can a 3mm LED strip be?

Accepted Answer

DENO's ultra-narrow boards start at 3 mm PCB width, with 4 mm, 5 mm, 6 mm and 8 mm as standard steps. A 3 mm strip fits inside slim aluminium reveals, glass-edge details and joinery grooves that will not accept the usual 8–10 mm tape.

Question 20

What is the cut unit on an ultra-narrow LED strip?

Accepted Answer

Cut intervals typically run from 12.5 mm to 50 mm depending on voltage and density, and micro-cut versions shorten this further for exact millwork lengths. Ask for the cut unit in the quote — it decides how closely the finished run matches the drawing.

Question 21

Can I order a custom width LED strip?

Accepted Answer

Yes — PCB width from 3 mm, LED density, CCT and CRI, copper weight, cut unit, IP class and connector are all configurable. DENO is a manufacturer, so a non-standard width is tooled from an existing FPCB stack-up instead of being ruled out.

CRI	Ra≥90 / Ra≥95
LED QTY	350 LEDs/m
PART NO	DL-F21D175V24-9677-*
SMD TYPE	2110
CUTTABLE UNIT	7LEDs/20mm
DIMMABLE	Yes
IP RATING	IP68
LED PITCH	2.8mm
PCB WIDTH	4mm
BEAM ANGLE	120°
RUN LENGTH	5M
COPPER FOIL	3oz
ON OFF TIMES	10000 (test times)
POWER RANGE	3~12W
CIRCUIT TYPE	C.V.
INPUT VOLTAGE	24V
LUMINOUS FLUX	505 lm/m @4000K
MIN BEND DIAMETER	Φ60mm
OPERATING TEMPERATURE	-25~40°C;Tc：75°C（max）

CCT (K)	Ra 80 — Luminous Efficacy (lm/W)	Ra 80 — Luminous Flux (lm/m)	Ra 80 — ErP Energy Class	Ra 90 — Luminous Efficacy (lm/W)	Ra 90 — Luminous Flux (lm/m)	Ra 90 — ErP Energy Class	Full Spectrum (Ra 95+) — Luminous Efficacy (lm/W)	Full Spectrum (Ra 95+) — Luminous Flux (lm/m)	Full Spectrum (Ra 95+) — ErP Energy Class
1800 K	—	—	—	50.9 lm/W	244.3 lm/m	G	—	—	—
2300 K	—	—	—	56.7 lm/W	272.3 lm/m	G	45.9 lm/W	220.2 lm/m	G
2700 K	—	—	—	61.3 lm/W	294.4 lm/m	G	49.8 lm/W	238.9 lm/m	G
3000 K	—	—	—	64.6 lm/W	310.1 lm/m	G	52.5 lm/W	252.1 lm/m	G
3500 K	—	—	—	65.7 lm/W	315.5 lm/m	G	54.1 lm/W	259.5 lm/m	G
4000 K	—	—	—	67.3 lm/W	322.9 lm/m	G	55.6 lm/W	266.9 lm/m	G
5000 K	—	—	—	67.3 lm/W	322.9 lm/m	G	55.7 lm/W	267.4 lm/m	G
6500 K	—	—	—	64.5 lm/W	309.6 lm/m	G	53.5 lm/W	257 lm/m	G

CCT (K)	Ra 80 — Luminous Efficacy (lm/W)	Ra 80 — Luminous Flux (lm/m)	Ra 80 — ErP Energy Class	Ra 90 — Luminous Efficacy (lm/W)	Ra 90 — Luminous Flux (lm/m)	Ra 90 — ErP Energy Class	Full Spectrum (Ra 95+) — Luminous Efficacy (lm/W)	Full Spectrum (Ra 95+) — Luminous Flux (lm/m)	Full Spectrum (Ra 95+) — ErP Energy Class
1800 K	—	—	—	50 lm/W	360.3 lm/m	G	—	—	—
2300 K	—	—	—	55.8 lm/W	401.6 lm/m	G	45.1 lm/W	324.7 lm/m	G
2700 K	—	—	—	60.3 lm/W	434.2 lm/m	G	48.9 lm/W	352.3 lm/m	G
3000 K	—	—	—	63.5 lm/W	457.4 lm/m	G	51.6 lm/W	371.9 lm/m	G
3500 K	—	—	—	64.6 lm/W	465.4 lm/m	G	53.2 lm/W	382.7 lm/m	G
4000 K	—	—	—	66.1 lm/W	476.2 lm/m	G	54.7 lm/W	393.6 lm/m	G
5000 K	—	—	—	66.1 lm/W	476.2 lm/m	G	54.8 lm/W	394.3 lm/m	G
6500 K	—	—	—	63.4 lm/W	456.7 lm/m	G	52.7 lm/W	379.1 lm/m	G

CCT (K)	Ra 80 — Luminous Efficacy (lm/W)	Ra 80 — Luminous Flux (lm/m)	Ra 80 — ErP Energy Class	Ra 90 — Luminous Efficacy (lm/W)	Ra 90 — Luminous Flux (lm/m)	Ra 90 — ErP Energy Class	Full Spectrum (Ra 95+) — Luminous Efficacy (lm/W)	Full Spectrum (Ra 95+) — Luminous Flux (lm/m)	Full Spectrum (Ra 95+) — ErP Energy Class
1800 K	—	—	—	49.2 lm/W	472.3 lm/m	G	—	—	—
2300 K	—	—	—	54.8 lm/W	526.5 lm/m	G	44.3 lm/W	425.8 lm/m	G
2700 K	—	—	—	59.3 lm/W	569.3 lm/m	G	48.1 lm/W	461.9 lm/m	G
3000 K	—	—	—	62.5 lm/W	599.7 lm/m	G	50.8 lm/W	487.5 lm/m	G
3500 K	—	—	—	63.6 lm/W	610.1 lm/m	G	52.3 lm/W	501.8 lm/m	G
4000 K	—	—	—	65 lm/W	624.4 lm/m	G	53.8 lm/W	516 lm/m	G
5000 K	—	—	—	65 lm/W	624.4 lm/m	G	53.9 lm/W	517 lm/m	G
6500 K	—	—	—	62.4 lm/W	598.7 lm/m	G	51.8 lm/W	497 lm/m	G

2110 High Density Ultra-Narrow PU LED Strip Light (#9677-PU)

Overview

Description

Specifications

Applications

Recommended accessories & compatible parts

Request a quotation for #9677-PU

Photometric Performance — CCT × CRI Efficacy Matrix

Grade DL (2nd Tier) · 4.8W/m

Grade DL (2nd Tier) · 7.2W/m

Grade DL (2nd Tier) · 9.6W/m

Recommended LED Channels

Related models in this series

Frequently Asked Questions

What are the key specifications of 9677-PU?

How long can a single run of this ultra narrow LED strip be?

Can DENO customise this ultra narrow LED strip for a project?

What makes an LED strip marine grade?

How narrow can a thin LED strip be?

Engineering & selection guide