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.

What are the longest LED light strips DENO manufactures?

Standard reels ship at 5 m, 10 m, 15 m, 20 m and 30 m, and OEM orders are produced as one continuous 50 m board with no mid-reel solder joint. Roll-to-roll plating is what makes that possible: the copper is deposited continuously, so length is not capped by panel size the way it is on die-cut FPCB.

Do you supply extra long LED strip lights in 65.6 ft or 100 ft?

Yes. 65.6 ft (20 m) and 100 ft (30 m) are stock run lengths, and anything longer than 32 feet is supplied as one uncut board rather than two reels joined with a connector. Joints are the usual failure point on extra long LED strip lights, so removing them is the single biggest reliability gain on a large install.

2835 Long Run LED Strip Light (#4274)

12mm · 24V · 60LEDs · 100cut

Model: 4274

4274 long led strip — 24V, cuttable every 100mm, 12mm FPCB width, 2835 LEDs, 60 LEDs/m, IP20

Overview

12mm | 24V | 60LEDs | 100cut | #4274 | 2835 Ultra-long LED Strip Light is part of the DENO Ultra-Long SMD Strips series, engineered around ultra long run LED strip. Key specifications: 2835, 60LEDs/m, 24V, 12mm PCB, 3oz copper FPCB, cuttable 6LEDs/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

This 24V constant-current 2835 long run LED strip light supports continuous single-feed runs up to 20 meters with uniform linear illumination. Engineered with 60 LEDs per meter on a durable 12mm 3oz copper PCB, the circuit ensures stable current regulation and thermal performance. The fully dimmable board features a wide 120-degree beam angle and precise 100mm cutting intervals across a 2.4W to 14.4W power range. Designed for architectural perimeter cove lighting and long commercial corridors, this low-wattage system minimizes power feed points across extended spaces. We deliver factory-direct production with OEM custom lengths, specialized IP ratings, and tailored color temperatures for wholesale project supply.

Constant Current Ic Led Strip built for c.c. smd strips (ic regulated) projects.

Specifications

LED QTY	60LEDs/m
PART NO	DL-F28A30V24-4274-*
SMD TYPE	2835
CUTTABLE UNIT	6LEDs/100mm
DIMMABLE	Yes
IP RATING	IP20
LED PITCH	16.6mm
PCB WIDTH	12mm
BEAM ANGLE	120°
RUN LENGTH	20m
COPPER FOIL	3oz
POWER RANGE	2.4~14.4W
CIRCUIT TYPE	C.C.
INPUT VOLTAGE	24V

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-1201 — 25x14.5mm Wide Surface Mount LED Channel — Aluminum Profile for 12mm Strip: Accepts LED strips up to 12mm wide.
DL-1202 — 17.3x14.5mm Surface Mount LED Channel — Deep Aluminum Profile for 12mm Strip: Accepts LED strips up to 12mm wide.
DL-1204 — 25x7mm Wide Slim Surface Mount LED Channel — Dotless Aluminum Profile for 240 LEDs/m: Accepts LED strips up to 12mm 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 #4274

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: 152.5 lm/W at 4000K, Ra 80, ErP energy class D (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 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	112 lm/W	537.6 lm/m	E	89.7 lm/W	430.4 lm/m	F	—	—	—
2300 K	124.6 lm/W	598.3 lm/m	E	99.9 lm/W	479.3 lm/m	F	80.9 lm/W	388.3 lm/m	G
2700 K	131.3 lm/W	630.1 lm/m	E	108 lm/W	518.5 lm/m	F	87.5 lm/W	420.1 lm/m	F
3000 K	140.3 lm/W	673.2 lm/m	D	113.7 lm/W	545.9 lm/m	E	92.4 lm/W	443.6 lm/m	F
3500 K	142.4 lm/W	683.5 lm/m	D	115.7 lm/W	555.2 lm/m	E	95.3 lm/W	457.3 lm/m	F
4000 K	147 lm/W	705.5 lm/m	D	118.5 lm/W	568.9 lm/m	E	97.8 lm/W	469.5 lm/m	F
5000 K	146.8 lm/W	704.5 lm/m	D	118.4 lm/W	568.4 lm/m	E	97.7 lm/W	469 lm/m	F
6500 K	134.3 lm/W	644.8 lm/m	E	113.6 lm/W	545.4 lm/m	E	94.3 lm/W	452.6 lm/m	F

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 7.2 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	110.1 lm/W	792.9 lm/m	E	88.2 lm/W	634.8 lm/m	F	—	—	—
2300 K	122.6 lm/W	882.5 lm/m	E	98.2 lm/W	707 lm/m	F	79.5 lm/W	572.4 lm/m	G
2700 K	129.1 lm/W	929.4 lm/m	E	106.2 lm/W	764.7 lm/m	F	86.1 lm/W	619.6 lm/m	F
3000 K	137.9 lm/W	992.9 lm/m	D	111.8 lm/W	805.2 lm/m	E	90.9 lm/W	654.3 lm/m	F
3500 K	140 lm/W	1008.1 lm/m	D	113.7 lm/W	818.9 lm/m	E	93.7 lm/W	674.5 lm/m	F
4000 K	144.5 lm/W	1040.6 lm/m	D	116.5 lm/W	839.1 lm/m	E	96.2 lm/W	692.5 lm/m	F
5000 K	144.3 lm/W	1039.2 lm/m	D	116.4 lm/W	838.4 lm/m	E	96.1 lm/W	691.9 lm/m	F
6500 K	132.1 lm/W	951.1 lm/m	E	111.7 lm/W	804.5 lm/m	E	92.7 lm/W	667.4 lm/m	F

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 8.5 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	109.1 lm/W	927.6 lm/m	F	87.4 lm/W	742.6 lm/m	F	—	—	—
2300 K	121.4 lm/W	1032.3 lm/m	E	97.3 lm/W	827 lm/m	F	78.8 lm/W	669.8 lm/m	G
2700 K	127.9 lm/W	1087.2 lm/m	E	105.2 lm/W	894.6 lm/m	F	85.3 lm/W	724.8 lm/m	F
3000 K	136.7 lm/W	1161.6 lm/m	D	110.8 lm/W	941.9 lm/m	E	90 lm/W	765.4 lm/m	F
3500 K	138.7 lm/W	1179.3 lm/m	D	112.7 lm/W	958 lm/m	E	92.8 lm/W	789 lm/m	F
4000 K	143.2 lm/W	1217.3 lm/m	D	115.5 lm/W	981.6 lm/m	E	95.3 lm/W	810.1 lm/m	F
5000 K	143 lm/W	1215.6 lm/m	D	115.4 lm/W	980.8 lm/m	E	95.2 lm/W	809.2 lm/m	F
6500 K	130.9 lm/W	1112.6 lm/m	E	110.7 lm/W	941.1 lm/m	E	91.9 lm/W	781.2 lm/m	F

Grade DL (2nd Tier)

Grade DL (2nd Tier) — measured at 12 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	106.5 lm/W	1277.7 lm/m	F	85.2 lm/W	1022.9 lm/m	F	—	—	—
2300 K	118.5 lm/W	1422 lm/m	E	94.9 lm/W	1139.2 lm/m	F	76.9 lm/W	922.8 lm/m	G
2700 K	124.8 lm/W	1497.6 lm/m	E	102.7 lm/W	1232.3 lm/m	F	83.2 lm/W	998.4 lm/m	G
3000 K	133.3 lm/W	1600 lm/m	E	108.1 lm/W	1297.5 lm/m	F	87.9 lm/W	1054.3 lm/m	F
3500 K	135.4 lm/W	1624.5 lm/m	D	110 lm/W	1319.6 lm/m	F	90.6 lm/W	1086.9 lm/m	F
4000 K	139.7 lm/W	1676.8 lm/m	D	112.7 lm/W	1352.2 lm/m	E	93 lm/W	1115.9 lm/m	F
5000 K	139.5 lm/W	1674.5 lm/m	D	112.6 lm/W	1351 lm/m	E	92.9 lm/W	1114.8 lm/m	F
6500 K	127.7 lm/W	1532.5 lm/m	E	108 lm/W	1296.3 lm/m	F	89.7 lm/W	1076.4 lm/m	F

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	119.4 lm/W	573.3 lm/m	E	100.5 lm/W	482.3 lm/m	F	—	—	—
2300 K	130.3 lm/W	625.2 lm/m	E	112.1 lm/W	538.1 lm/m	F	90.8 lm/W	435.8 lm/m	G
2700 K	140.4 lm/W	673.7 lm/m	E	121.4 lm/W	582.6 lm/m	E	98.3 lm/W	472 lm/m	F
3000 K	147.5 lm/W	708 lm/m	D	128.1 lm/W	615 lm/m	E	104.2 lm/W	500.4 lm/m	F
3500 K	149.6 lm/W	718.3 lm/m	D	130.9 lm/W	628.2 lm/m	E	107.7 lm/W	517 lm/m	F
4000 K	152.5 lm/W	732 lm/m	D	131.7 lm/W	632.1 lm/m	E	108.6 lm/W	521.4 lm/m	F
5000 K	152.2 lm/W	730.5 lm/m	D	132.5 lm/W	636 lm/m	E	109.3 lm/W	524.6 lm/m	F
6500 K	146 lm/W	700.6 lm/m	D	126.6 lm/W	607.6 lm/m	E	105.1 lm/W	504.5 lm/m	F

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 7.2 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	117.4 lm/W	845.6 lm/m	F	98.8 lm/W	711.3 lm/m	F	—	—	—
2300 K	128.1 lm/W	922.2 lm/m	E	110.2 lm/W	793.6 lm/m	F	89.3 lm/W	643 lm/m	G
2700 K	138 lm/W	993.7 lm/m	E	119.4 lm/W	859.3 lm/m	E	96.7 lm/W	696.1 lm/m	F
3000 K	145 lm/W	1044.2 lm/m	E	126 lm/W	907 lm/m	E	102.5 lm/W	738 lm/m	F
3500 K	147.1 lm/W	1059.4 lm/m	D	128.7 lm/W	926.5 lm/m	E	105.9 lm/W	762.6 lm/m	F
4000 K	149.9 lm/W	1079.6 lm/m	D	129.5 lm/W	932.3 lm/m	E	106.8 lm/W	769.1 lm/m	F
5000 K	149.6 lm/W	1077.4 lm/m	D	130.3 lm/W	938.1 lm/m	E	107.5 lm/W	774 lm/m	F
6500 K	143.5 lm/W	1033.4 lm/m	E	124.5 lm/W	896.2 lm/m	E	103.3 lm/W	743.8 lm/m	F

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 8.5 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	116.4 lm/W	989.2 lm/m	F	97.9 lm/W	832.1 lm/m	F	—	—	—
2300 K	126.9 lm/W	1078.8 lm/m	E	109.2 lm/W	928.4 lm/m	F	88.5 lm/W	752.3 lm/m	G
2700 K	136.8 lm/W	1162.4 lm/m	E	118.3 lm/W	1005.3 lm/m	F	95.8 lm/W	814.4 lm/m	F
3000 K	143.7 lm/W	1221.6 lm/m	E	124.8 lm/W	1061 lm/m	E	101.6 lm/W	863.4 lm/m	F
3500 K	145.8 lm/W	1239.3 lm/m	D	127.5 lm/W	1083.9 lm/m	E	105 lm/W	892.1 lm/m	F
4000 K	148.6 lm/W	1262.9 lm/m	D	128.3 lm/W	1090.6 lm/m	E	105.8 lm/W	899.7 lm/m	F
5000 K	148.3 lm/W	1260.4 lm/m	D	129.1 lm/W	1097.4 lm/m	E	106.5 lm/W	905.3 lm/m	F
6500 K	142.2 lm/W	1208.9 lm/m	E	123.3 lm/W	1048.4 lm/m	E	102.4 lm/W	870.4 lm/m	F

Grade DN (1st Tier)

Grade DN (1st Tier) — measured at 12 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	113.6 lm/W	1362.7 lm/m	F	95.5 lm/W	1146.2 lm/m	F	—	—	—
2300 K	123.8 lm/W	1486 lm/m	E	106.6 lm/W	1278.9 lm/m	F	86.3 lm/W	1035.6 lm/m	G
2700 K	133.4 lm/W	1601.2 lm/m	E	115.4 lm/W	1384.8 lm/m	F	93.5 lm/W	1121.8 lm/m	F
3000 K	140.2 lm/W	1682.7 lm/m	E	121.8 lm/W	1461.6 lm/m	E	99.1 lm/W	1189.3 lm/m	F
3500 K	142.3 lm/W	1707.1 lm/m	E	124.4 lm/W	1493 lm/m	E	102.4 lm/W	1228.8 lm/m	F
4000 K	145 lm/W	1739.7 lm/m	E	125.2 lm/W	1502.3 lm/m	E	103.3 lm/W	1239.3 lm/m	F
5000 K	144.7 lm/W	1736.2 lm/m	E	126 lm/W	1511.6 lm/m	E	103.9 lm/W	1246.8 lm/m	F
6500 K	138.8 lm/W	1665.2 lm/m	E	120.3 lm/W	1444.1 lm/m	E	99.9 lm/W	1198.8 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	99 lm/W	475.4 lm/m	F	79.1 lm/W	379.9 lm/m	G	—	—	—
2300 K	110.4 lm/W	529.7 lm/m	E	88.2 lm/W	423.5 lm/m	F	71.5 lm/W	343.2 lm/m	G
2700 K	118.9 lm/W	570.9 lm/m	E	95.7 lm/W	459.2 lm/m	F	77.5 lm/W	372.1 lm/m	G
3000 K	124.9 lm/W	599.7 lm/m	E	101.1 lm/W	485.2 lm/m	F	82.2 lm/W	394.6 lm/m	G
3500 K	126.8 lm/W	608.6 lm/m	E	103.1 lm/W	495 lm/m	F	84.9 lm/W	407.3 lm/m	G
4000 K	130.5 lm/W	626.2 lm/m	E	105.3 lm/W	505.2 lm/m	F	86.9 lm/W	417.1 lm/m	F
5000 K	130.2 lm/W	625.2 lm/m	E	105.3 lm/W	505.2 lm/m	F	86.8 lm/W	416.6 lm/m	F
6500 K	124.9 lm/W	599.7 lm/m	E	101.1 lm/W	485.2 lm/m	F	83.9 lm/W	402.7 lm/m	G

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 7.2 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	97.4 lm/W	701.2 lm/m	F	77.8 lm/W	560.3 lm/m	G	—	—	—
2300 K	108.5 lm/W	781.3 lm/m	F	86.8 lm/W	624.6 lm/m	F	70.3 lm/W	506.2 lm/m	G
2700 K	116.9 lm/W	842 lm/m	E	94.1 lm/W	677.3 lm/m	F	76.2 lm/W	548.8 lm/m	G
3000 K	122.9 lm/W	884.6 lm/m	E	99.4 lm/W	715.6 lm/m	F	80.8 lm/W	582 lm/m	G
3500 K	124.7 lm/W	897.6 lm/m	E	101.4 lm/W	730 lm/m	F	83.4 lm/W	600.8 lm/m	G
4000 K	128.3 lm/W	923.6 lm/m	E	103.5 lm/W	745.2 lm/m	F	85.4 lm/W	615.2 lm/m	F
5000 K	128.1 lm/W	922.1 lm/m	E	103.5 lm/W	745.2 lm/m	F	85.4 lm/W	614.9 lm/m	F
6500 K	122.9 lm/W	884.6 lm/m	E	99.4 lm/W	715.6 lm/m	F	82.5 lm/W	594 lm/m	G

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 8.5 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	96.5 lm/W	820.2 lm/m	F	77.1 lm/W	655.5 lm/m	G	—	—	—
2300 K	107.5 lm/W	914 lm/m	F	86 lm/W	730.7 lm/m	F	69.6 lm/W	591.6 lm/m	G
2700 K	115.9 lm/W	985 lm/m	E	93.2 lm/W	792.4 lm/m	F	75.5 lm/W	642 lm/m	G
3000 K	121.7 lm/W	1034.8 lm/m	E	98.5 lm/W	837.1 lm/m	F	80.1 lm/W	680.8 lm/m	G
3500 K	123.5 lm/W	1050 lm/m	E	100.5 lm/W	854 lm/m	F	82.7 lm/W	702.8 lm/m	G
4000 K	127.1 lm/W	1080.4 lm/m	E	102.6 lm/W	871.8 lm/m	F	84.7 lm/W	719.7 lm/m	G
5000 K	126.9 lm/W	1078.7 lm/m	E	102.6 lm/W	871.8 lm/m	F	84.6 lm/W	719.1 lm/m	G
6500 K	121.7 lm/W	1034.8 lm/m	E	98.5 lm/W	837.1 lm/m	F	81.7 lm/W	694.5 lm/m	G

Grade KE (3rd Tier)

Grade KE (3rd Tier) — measured at 12 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	94.2 lm/W	1129.8 lm/m	F	75.2 lm/W	902.9 lm/m	G	—	—	—
2300 K	104.9 lm/W	1259 lm/m	F	83.9 lm/W	1006.5 lm/m	G	67.9 lm/W	814.8 lm/m	G
2700 K	113.1 lm/W	1356.7 lm/m	E	91 lm/W	1091.4 lm/m	F	73.7 lm/W	884.3 lm/m	G
3000 K	118.8 lm/W	1425.4 lm/m	E	96.1 lm/W	1153.1 lm/m	F	78.2 lm/W	937.9 lm/m	G
3500 K	120.5 lm/W	1446.3 lm/m	E	98 lm/W	1176.4 lm/m	F	80.7 lm/W	968.1 lm/m	G
4000 K	124 lm/W	1488.2 lm/m	E	100.1 lm/W	1200.8 lm/m	F	82.6 lm/W	991.4 lm/m	G
5000 K	123.8 lm/W	1485.9 lm/m	E	100.1 lm/W	1200.8 lm/m	F	82.6 lm/W	991.2 lm/m	G
6500 K	118.8 lm/W	1425.4 lm/m	E	96.1 lm/W	1153.1 lm/m	F	79.8 lm/W	957.6 lm/m	G

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 12mm wide, so it needs a channel with at least 14mm inner width (12mm + 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 4274?

4274: 2835, 60LEDs/m, 24V, 12mm PCB, 3oz copper FPCB, cuttable 6LEDs/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 20m. 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.

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.

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.

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