What is a constant current LED strip?

A constant current LED strip carries a linear CC driver IC on the board that holds a fixed current through each segment regardless of the input voltage seen at that point. Brightness therefore stays flat along the run, instead of falling off with voltage drop the way a plain constant-voltage strip does.

Constant current vs constant voltage LED strip — which is better?

Constant voltage is cheaper and fine for short runs under 3 m. Constant current is the right choice whenever the run is long, the copper is thin, the input voltage is unstable, or the installation is camera-facing — the IC absorbs supply variation and keeps every metre at the same luminous flux.

Can a constant current LED strip be powered from both ends or mid-feed?

Yes. Because regulation happens per segment, DENO's CC boards accept single-end, both-ends and any mid-strip tap. Both-ends and mid-feed wiring halve the effective feed distance, which is how a single driver covers a long corridor or perimeter cove.

Does a constant current LED strip dim without flicker?

It does when the driver is matched to it. Linear CC ICs dim smoothly on PWM down to about 1%, and at 16 kHz+ PWM the run is flicker-free on camera (low Pst LM and SVM). Analogue dimming of a CC board is not recommended below 20% because the IC needs headroom.

How long can a constant current LED strip run be?

Up to 20 m and beyond on 24V or 48V builds with 2 oz copper, versus 5 m for a comparable constant-voltage board. The practical limit becomes the copper's current-carrying capacity and thermal design rather than perceived brightness fall-off.

Can I order a custom constant current LED strip?

Yes — segment length, drive current, voltage, LED density, CCT/CRI, PCB width and copper weight are all configurable, and CC regulation can be combined with high-density, ultra-narrow or full-spectrum layouts on the same board.

How long can a long LED strip run be on a single power feed?

A standard 24V constant-voltage tape is limited to about 5 m before the far end visibly dims. DENO's long-run boards combine 2 oz to 3 oz copper, 24V or 48V input and per-segment constant-current ICs, which takes a single feed to 20 m, and up to 50 m on 48V builds, with no measurable fall-off between the first and last metre.

Why do long strip lights get dimmer at the far end, and how is it fixed?

Copper resistance drops the supply voltage along the tape, so LEDs near the end of the run receive less drive current. Three fixes work together: raise the voltage (24V, 36V or 48V), raise the copper weight (2 oz or 3 oz), and add a linear constant-current IC per segment so each segment holds its current regardless of the local voltage it sees.

Can long LED light strips be cut to an exact length for a room or kitchen?

Yes. Cut units run from 12.5 mm to 100 mm depending on voltage and density, so a run can be trimmed to a drawing dimension on site, and DENO also pre-cuts and pre-wires to length at the factory for room, cove and kitchen installations. Ask for the cut unit in the quote — it decides how closely the finished line matches the millwork.

2835 Constant Current Long Run Multi-Line LED Strip Light (#5274)

15mm · 24V · 140LEDs · 100mm/cut

Model: 5274

5274 long led strip — 24V, cuttable every 100mm, 15mm FPCB width, 2835 LEDs, 140 LEDs/m, 1900–6500K

Overview

15mm | 24V | 140LEDs | 100mm/cut | #5274 | 2835 Constant Current Ultra-Long Multi-Line LED Strip Light is part of the DENO Ultra-Long SMD Strips series, engineered around ultra long run LED strip. Key specifications: 2835, 140 LEDs/m, 24V, 15mm PCB, 3oz copper FPCB, cuttable 14LEDs/100mm. Every reel is produced on DENO's roll-to-roll line with 99.9% pure copper FPCB and ships CE, UL and RoHS compliant for architectural, retail and hospitality projects. OEM and ODM configurations of length, colour temperature and waterproofing are available on request.

Description

Engineered with a constant-current circuit and 140 LEDs per meter, this 2835 LED strip light maintains uniform brightness across extended runs. The robust 15mm wide PCB features heavy 3oz copper foil to deliver stable 24V power distribution over single runs up to 10 meters. Dimmable 2835 SMD chips offer a wide 120-degree beam angle with precise cutting increments every 100mm for flexible on-site architectural lighting installations. Ideal for commercial cove lighting, DENO provides factory-direct OEM custom lengths with tailored CCT options for wholesale project supply.

We use 99.99% gold wire, large-size chips, and thickened FPCB, backed by a 5-year warranty.

Specifications

CCT (K)	1900–6500K
CRI	Ra≥80
POWER (W/M)	14.4 W/m
LED QTY	140 LEDs/m
PART NO	DL-F28A70V24-5274-*
SMD TYPE	2835
CUTTABLE UNIT	14LEDs/100mm
DIMMABLE	Yes
IP RATING	IP20
LED PITCH	14.2mm
PCB WIDTH	15mm
BEAM ANGLE	120°
RUN LENGTH	10m
COPPER FOIL	3oz
POWER RANGE	2.4~24W
CIRCUIT TYPE	C.C.
INPUT VOLTAGE	24V
LUMINOUS FLUX	1710–2255 lm/m

Applications

Cove, wall-wash & perimeter lighting — Coves, recesses, wall-wash details and ceiling perimeters where a continuous, uniform line of light is required.
Showroom & hospitality display lighting — Shelving, display cases, reception desks and signage backlighting in shops, showrooms and hospitality spaces.
Kitchen & wardrobe under-cabinet lighting — Kitchen, wardrobe and furniture task lighting where the strip stays hidden and only the light is seen.
Long corridor & warehouse runs — Long single-feed runs on 24V cover corridors, warehouse aisles and facade lines with fewer injection points and fewer power supplies.

Recommended accessories & compatible parts

DL-2001 — 30x9.7mm Ultra-Slim Surface LED Channel — Low Profile Aluminum Strip Housing: Accepts LED strips up to 15mm wide.
DL-2002 — 20x02mm Ultra-Slim Surface LED Channel — Flat Aluminum LED Strip Profile: Accepts LED strips up to 15mm wide.
DL-2010 — 20x10mm Wide Surface Mount LED Channel — Dotless Aluminum Profile for 240 LEDs/m: Accepts LED strips up to 15mm wide.
DN-PSU-100 — 24V 100W Class-2 LED Driver · High Efficiency: Matches the 24V DC input of this strip; size the driver with at least 20% headroom over total load.
DN-PSU-150 — 24V 150W Class-2 LED Driver · Premium: Matches the 24V DC input of this strip; size the driver with at least 20% headroom over total load.
DN-PSU-60 — 24V 60W Class-2 LED Driver · Constant Voltage: Matches the 24V DC input of this strip; size the driver with at least 20% headroom over total load.
V1 — 5-36VDC 1-Channel * 8A RF+Push Dimming Controller | V1: Matched by input voltage range and colour channels.

Request a quotation for #5274

DENO LED is a Shenzhen-based LED strip manufacturer with its own Foshan production base. Send the run length, voltage, CCT/CRI and IP rating you need and our engineering team replies with a specification sheet, wiring plan and price — OEM/ODM and fully custom builds included.

Warranty: 5 years
Lead time: standard boards: samples from 1 working day · custom: 3–5 working days · new FPCB: 1–3 weeks · production 1–2 weeks after sample approval
Compliance: CE · UL · RoHS
Bonding wire: 99.99% pure gold
Copper foil: 99.9% pure copper FPCB

Contact DENO LED engineers · OEM / ODM capability

Photometric Performance — CCT × CRI Efficacy Matrix

Peak measured luminous efficacy: 179.6 lm/W at 4000K, Ra 80, ErP energy class C (Grade DN (1st Tier)).

All values are measured at the stated power density and ambient 25 °C, reported as luminous efficacy in lumens per watt (lm/W), luminous flux per metre (lm/m) and the corresponding EU ErP (2019/2015) energy class.

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 4.8 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	140.8 lm/W	675.7 lm/m	E	118.6 lm/W	569.2 lm/m	F	—	—	—
2300 K	153.4 lm/W	736.4 lm/m	D	132.3 lm/W	634.9 lm/m	E	107.1 lm/W	514.1 lm/m	F
2700 K	165.4 lm/W	793.9 lm/m	D	143.1 lm/W	686.9 lm/m	E	116 lm/W	557 lm/m	F
3000 K	173.7 lm/W	833.7 lm/m	C	151.1 lm/W	725.1 lm/m	D	122.9 lm/W	590.1 lm/m	E
3500 K	176.3 lm/W	846.4 lm/m	C	154.4 lm/W	740.9 lm/m	D	127.1 lm/W	610 lm/m	E
4000 K	179.6 lm/W	862.2 lm/m	C	155.2 lm/W	745 lm/m	D	128.1 lm/W	615.1 lm/m	E
5000 K	179.3 lm/W	860.7 lm/m	C	156.3 lm/W	750.1 lm/m	D	128.9 lm/W	618.7 lm/m	E
6500 K	172 lm/W	825.5 lm/m	D	149.4 lm/W	717 lm/m	D	124 lm/W	595.2 lm/m	E

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 9.6 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	136.1 lm/W	1306.6 lm/m	E	114.7 lm/W	1100.7 lm/m	F	—	—	—
2300 K	148.3 lm/W	1423.9 lm/m	D	127.9 lm/W	1227.8 lm/m	E	103.6 lm/W	994.6 lm/m	F
2700 K	159.9 lm/W	1535.2 lm/m	D	138.4 lm/W	1328.3 lm/m	E	112.2 lm/W	1077 lm/m	F
3000 K	167.9 lm/W	1612.1 lm/m	D	146.1 lm/W	1402.2 lm/m	D	118.9 lm/W	1141.1 lm/m	E
3500 K	170.5 lm/W	1636.7 lm/m	D	149.2 lm/W	1432.8 lm/m	D	122.9 lm/W	1179.5 lm/m	E
4000 K	173.7 lm/W	1667.3 lm/m	C	150.1 lm/W	1440.6 lm/m	D	123.9 lm/W	1189.4 lm/m	E
5000 K	173.4 lm/W	1664.3 lm/m	C	151.1 lm/W	1450.5 lm/m	D	124.7 lm/W	1197.1 lm/m	E
6500 K	166.3 lm/W	1596.3 lm/m	D	144.4 lm/W	1386.4 lm/m	E	119.9 lm/W	1151 lm/m	E

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 14.4 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	131.6 lm/W	1895 lm/m	E	110.9 lm/W	1596.3 lm/m	F	—	—	—
2300 K	143.4 lm/W	2065 lm/m	E	123.7 lm/W	1780.6 lm/m	E	100.2 lm/W	1442.9 lm/m	F
2700 K	154.6 lm/W	2226.5 lm/m	D	133.8 lm/W	1926.4 lm/m	E	108.5 lm/W	1562 lm/m	F
3000 K	162.4 lm/W	2338 lm/m	D	141.2 lm/W	2033.6 lm/m	E	114.9 lm/W	1654.9 lm/m	F
3500 K	164.8 lm/W	2373.7 lm/m	D	144.3 lm/W	2077.9 lm/m	E	118.8 lm/W	1710.6 lm/m	E
4000 K	167.9 lm/W	2418 lm/m	D	145.1 lm/W	2089.3 lm/m	E	119.8 lm/W	1724.9 lm/m	E
5000 K	167.6 lm/W	2413.7 lm/m	D	146.1 lm/W	2103.6 lm/m	D	120.5 lm/W	1735.2 lm/m	E
6500 K	160.8 lm/W	2315.1 lm/m	D	139.6 lm/W	2010.7 lm/m	E	115.9 lm/W	1669 lm/m	F

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 19.2 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	127.2 lm/W	2442.8 lm/m	E	107.2 lm/W	2057.8 lm/m	F	—	—	—
2300 K	138.6 lm/W	2662.1 lm/m	E	119.6 lm/W	2295.5 lm/m	E	96.8 lm/W	1858.6 lm/m	F
2700 K	149.5 lm/W	2870.2 lm/m	D	129.3 lm/W	2483.4 lm/m	E	104.9 lm/W	2013.6 lm/m	F
3000 K	157 lm/W	3013.9 lm/m	D	136.5 lm/W	2621.5 lm/m	E	111.1 lm/W	2133.3 lm/m	F
3500 K	159.4 lm/W	3060 lm/m	D	139.5 lm/W	2678.6 lm/m	E	114.9 lm/W	2205.2 lm/m	F
4000 K	162.3 lm/W	3117.1 lm/m	D	140.3 lm/W	2693.4 lm/m	E	115.8 lm/W	2223.6 lm/m	F
5000 K	162.1 lm/W	3111.6 lm/m	D	141.2 lm/W	2711.8 lm/m	E	116.5 lm/W	2236.8 lm/m	F
6500 K	155.4 lm/W	2984.5 lm/m	D	135 lm/W	2592.1 lm/m	E	112.1 lm/W	2152.3 lm/m	F

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 4.8 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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
1900 K	116.8 lm/W	560.8 lm/m	E	93.6 lm/W	449.2 lm/m	F	—	—	—
2300 K	130.3 lm/W	625.4 lm/m	E	104.3 lm/W	500.7 lm/m	F	84.5 lm/W	405.6 lm/m	G
2700 K	140.4 lm/W	673.8 lm/m	D	113.1 lm/W	542.9 lm/m	E	91.7 lm/W	440.1 lm/m	F
3000 K	147.5 lm/W	708 lm/m	D	119.6 lm/W	574 lm/m	E	97.2 lm/W	466.5 lm/m	F
3500 K	149.6 lm/W	718.1 lm/m	D	121.9 lm/W	585.2 lm/m	E	100.3 lm/W	481.3 lm/m	F
4000 K	154.1 lm/W	739.5 lm/m	D	124.5 lm/W	597.4 lm/m	E	102.8 lm/W	493.5 lm/m	F
5000 K	153.9 lm/W	738.5 lm/m	D	124.5 lm/W	597.4 lm/m	E	102.7 lm/W	493 lm/m	F
6500 K	147.5 lm/W	708 lm/m	D	119.5 lm/W	573.5 lm/m	E	99.2 lm/W	476.2 lm/m	F

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 9.6 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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
1900 K	113 lm/W	1084.3 lm/m	E	90.5 lm/W	868.6 lm/m	F	—	—	—
2300 K	126 lm/W	1209.4 lm/m	E	100.8 lm/W	968.1 lm/m	F	81.7 lm/W	784.3 lm/m	G
2700 K	135.7 lm/W	1303 lm/m	D	109.4 lm/W	1049.9 lm/m	F	88.6 lm/W	850.9 lm/m	F
3000 K	142.6 lm/W	1369 lm/m	D	115.6 lm/W	1109.9 lm/m	E	94 lm/W	902.1 lm/m	F
3500 K	144.7 lm/W	1388.7 lm/m	D	117.9 lm/W	1131.6 lm/m	E	96.9 lm/W	930.7 lm/m	F
4000 K	149 lm/W	1430 lm/m	D	120.3 lm/W	1155.2 lm/m	E	99.4 lm/W	954.3 lm/m	F
5000 K	148.8 lm/W	1428.1 lm/m	D	120.3 lm/W	1155.2 lm/m	E	99.3 lm/W	953.3 lm/m	F
6500 K	142.6 lm/W	1369 lm/m	D	115.5 lm/W	1109 lm/m	E	95.9 lm/W	920.6 lm/m	F

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 14.4 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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
1900 K	109.2 lm/W	1572.6 lm/m	F	87.5 lm/W	1259.8 lm/m	F	—	—	—
2300 K	121.8 lm/W	1754 lm/m	E	97.5 lm/W	1404 lm/m	F	79 lm/W	1137.6 lm/m	G
2700 K	131.2 lm/W	1889.7 lm/m	E	105.7 lm/W	1522.6 lm/m	F	85.7 lm/W	1234.1 lm/m	F
3000 K	137.9 lm/W	1985.4 lm/m	D	111.8 lm/W	1609.7 lm/m	E	90.9 lm/W	1308.3 lm/m	F
3500 K	139.9 lm/W	2013.9 lm/m	D	114 lm/W	1641.1 lm/m	E	93.7 lm/W	1349.8 lm/m	F
4000 K	144 lm/W	2073.9 lm/m	D	116.3 lm/W	1675.4 lm/m	E	96.1 lm/W	1384 lm/m	F
5000 K	143.8 lm/W	2071.1 lm/m	D	116.3 lm/W	1675.4 lm/m	E	96 lm/W	1382.4 lm/m	F
6500 K	137.9 lm/W	1985.4 lm/m	D	111.7 lm/W	1608.3 lm/m	E	92.7 lm/W	1334.9 lm/m	F

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 19.2 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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
1900 K	105.6 lm/W	2027.2 lm/m	F	84.6 lm/W	1624 lm/m	G	—	—	—
2300 K	117.8 lm/W	2261.1 lm/m	E	94.3 lm/W	1810 lm/m	F	76.4 lm/W	1466.9 lm/m	G
2700 K	126.9 lm/W	2436 lm/m	E	102.2 lm/W	1962.8 lm/m	F	82.9 lm/W	1590.9 lm/m	G
3000 K	133.3 lm/W	2559.4 lm/m	E	108.1 lm/W	2075.1 lm/m	F	87.8 lm/W	1686.6 lm/m	F
3500 K	135.2 lm/W	2596.2 lm/m	D	110.2 lm/W	2115.6 lm/m	E	90.6 lm/W	1740 lm/m	F
4000 K	139.2 lm/W	2673.5 lm/m	D	112.5 lm/W	2159.8 lm/m	E	92.9 lm/W	1784.2 lm/m	F
5000 K	139.1 lm/W	2669.8 lm/m	D	112.5 lm/W	2159.8 lm/m	E	92.8 lm/W	1781.8 lm/m	F
6500 K	133.3 lm/W	2559.4 lm/m	E	108 lm/W	2073.3 lm/m	F	89.6 lm/W	1720.3 lm/m	F

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 4.8 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	136.9 lm/W	656.9 lm/m	D	109.7 lm/W	526.5 lm/m	F	—	—	—
2300 K	152.3 lm/W	731.3 lm/m	D	122.2 lm/W	586.6 lm/m	E	99 lm/W	475.2 lm/m	F
2700 K	160.9 lm/W	772.5 lm/m	C	132.2 lm/W	634.5 lm/m	E	107.2 lm/W	514.3 lm/m	F
3000 K	171.4 lm/W	822.9 lm/m	C	139.2 lm/W	668.1 lm/m	D	113.2 lm/W	543.4 lm/m	E
3500 K	174 lm/W	835.1 lm/m	C	141.6 lm/W	679.8 lm/m	D	116.6 lm/W	559.6 lm/m	E
4000 K	179.6 lm/W	862.1 lm/m	C	145 lm/W	696.1 lm/m	D	119.8 lm/W	574.9 lm/m	E
5000 K	179.4 lm/W	861.1 lm/m	C	144.9 lm/W	695.6 lm/m	D	119.6 lm/W	574.1 lm/m	E
6500 K	164.3 lm/W	788.8 lm/m	C	139.1 lm/W	667.6 lm/m	D	115.4 lm/W	553.9 lm/m	E

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 9.6 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	132.3 lm/W	1270.3 lm/m	E	106.1 lm/W	1018.2 lm/m	F	—	—	—
2300 K	147.3 lm/W	1414 lm/m	D	118.2 lm/W	1134.4 lm/m	E	95.7 lm/W	918.7 lm/m	F
2700 K	155.6 lm/W	1493.8 lm/m	D	127.8 lm/W	1226.9 lm/m	E	103.6 lm/W	994.5 lm/m	F
3000 K	165.8 lm/W	1591.3 lm/m	C	134.6 lm/W	1291.9 lm/m	E	109.4 lm/W	1050.7 lm/m	F
3500 K	168.2 lm/W	1614.9 lm/m	C	136.9 lm/W	1314.6 lm/m	D	112.7 lm/W	1082.2 lm/m	E
4000 K	173.7 lm/W	1667.1 lm/m	C	140.2 lm/W	1346.1 lm/m	D	115.8 lm/W	1111.7 lm/m	E
5000 K	173.5 lm/W	1665.1 lm/m	C	140.1 lm/W	1345.1 lm/m	D	115.6 lm/W	1109.8 lm/m	E
6500 K	158.9 lm/W	1525.3 lm/m	D	134.5 lm/W	1290.9 lm/m	E	111.6 lm/W	1071.4 lm/m	E

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 14.4 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	127.9 lm/W	1842.2 lm/m	E	102.5 lm/W	1476.6 lm/m	F	—	—	—
2300 K	142.4 lm/W	2050.7 lm/m	D	114.2 lm/W	1645.1 lm/m	E	92.5 lm/W	1332 lm/m	F
2700 K	150.4 lm/W	2166.4 lm/m	D	123.6 lm/W	1779.4 lm/m	E	100.2 lm/W	1442.4 lm/m	F
3000 K	160.3 lm/W	2307.8 lm/m	C	130.1 lm/W	1873.6 lm/m	E	105.8 lm/W	1523.8 lm/m	F
3500 K	162.6 lm/W	2342 lm/m	C	132.4 lm/W	1906.5 lm/m	E	109 lm/W	1569.5 lm/m	F
4000 K	167.9 lm/W	2417.7 lm/m	C	135.6 lm/W	1952.2 lm/m	D	112 lm/W	1612.3 lm/m	E
5000 K	167.7 lm/W	2414.9 lm/m	C	135.5 lm/W	1950.7 lm/m	D	111.8 lm/W	1609.9 lm/m	E
6500 K	153.6 lm/W	2212.1 lm/m	D	130 lm/W	1872.2 lm/m	E	107.9 lm/W	1553.8 lm/m	F

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 19.2 W/m: luminous efficacy (lm/W), luminous flux (lm/m) and ErP energy class per CCT and CRI grade.
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	123.7 lm/W	2374.8 lm/m	E	99.1 lm/W	1903.6 lm/m	F	—	—	—
2300 K	137.7 lm/W	2643.6 lm/m	D	110.5 lm/W	2120.8 lm/m	E	89.5 lm/W	1718.4 lm/m	F
2700 K	145.5 lm/W	2792.7 lm/m	D	119.5 lm/W	2293.8 lm/m	E	96.8 lm/W	1859.4 lm/m	F
3000 K	154.9 lm/W	2975 lm/m	D	125.8 lm/W	2415.3 lm/m	E	102.3 lm/W	1964.3 lm/m	F
3500 K	157.2 lm/W	3019.2 lm/m	D	128 lm/W	2457.7 lm/m	E	105.4 lm/W	2023.2 lm/m	F
4000 K	162.3 lm/W	3116.8 lm/m	C	131.1 lm/W	2516.6 lm/m	E	108.3 lm/W	2078.4 lm/m	F
5000 K	162.1 lm/W	3113.1 lm/m	C	131 lm/W	2514.8 lm/m	E	108.1 lm/W	2075.5 lm/m	F
6500 K	148.5 lm/W	2851.7 lm/m	D	125.7 lm/W	2413.5 lm/m	E	104.3 lm/W	2002.6 lm/m	F

High-Power LED Strip: Heat Dissipation & Aluminum Channel Guide

At up to 19.2W/m, 5274 is a high-power SMD LED strip. Above roughly 14.4W/m the tape can no longer shed its own heat through the FPC alone — an aluminum channel is part of the luminaire, not an accessory.

Why high-wattage strips need a heat sink

Aluminum conducts heat roughly 30× faster than the plastics, MDF or gypsum a strip is usually stuck to, so a bare high-power run traps heat under the tape.
LED lifetime (LM-80 / TM-21) is driven by solder-point temperature Tc. Keeping Tc inside the datasheet limit — DENO strips are rated Tc ≤ 75°C — is what preserves the rated L70 lifetime and colour stability.
Never run 14.4W/m or more coiled on the reel, inside a sealed plastic diffuser, or directly on wood, wallpaper or foam.

Sizing rule: FPC width vs channel inner width

Channel inner width ≥ FPC width + 2mm. This strip is 15mm wide, so it needs at least 17mm of inner width.
The 2mm clearance absorbs extrusion tolerance and lets the tape be seated or replaced without scraping the side walls or the wiring.
A frosted or opal PC cover then diffuses the higher lumen output into an even, dot-free line instead of visible hot spots.

Aluminum channels that fit this strip

Recommended LED Channels

Mount this LED strip in a DENO LED aluminum profile for heat dissipation, physical protection and diffused, dot-free output.

This strip is 15mm wide, so it needs a channel with at least 17mm inner width (15mm + 2mm clearance). Every profile below meets that.

Related models in this series

See every model in SMD LED Strip Series or narrow to Ic. Compare wattage, lumen output and run length in the ProCalc parameter library, or request OEM/ODM pricing on the custom manufacturing page.

Frequently Asked Questions

What are the key specifications of 5274?

5274: 2835, 140 LEDs/m, 24V, 15mm PCB, 3oz copper FPCB, cuttable 14LEDs/100mm. Full photometric data, wiring diagrams and test reports are available in the downloads section of this page.

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

Maximum single run for this model is 10m. Feeding from both ends or using a mid-point tap halves the effective distance per segment, so a ultra long run LED strip can cover twice that length on one circuit when wired accordingly.

Can DENO customise this ultra long run LED strip for a project?

Yes. DENO manufactures the Ultra-Long 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.

What limits how long an LED strip run can be?

Voltage drop and conductor current, not the LED itself. A long run LED strip combines low watts per metre, 2 oz or thicker copper and a higher bus voltage such as 24V, 36V or 48V to reach 20 m or more from one feed while staying inside a 3 percent drop.

Does a constant current LED strip really eliminate voltage drop?

Voltage still drops along the copper, but the per-segment constant current IC holds LED current fixed until the local voltage falls below its dropout point. Brightness therefore stays even end to end, and power can be injected at one end, both ends or any mid point of the run.

Engineering & selection guide

Bending limits, IP selection, voltage drop, cutting and the full buyer Q&A for this family are kept on the series page.

constant current LED strip series — Constant Current LED Strip — Buyer Questions
long LED strip lights series — Long LED Strip Lights — Buyer Questions
LED strip engineering selection handbook