Question 1

What are the key specifications of 3960?

Accepted Answer

3960: 2835, 130LEDs/m, DC 48V, 10mm PCB, 3oz copper FPCB, cuttable 13LEDs/100mm. 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 long run LED strip be?

Accepted Answer

Maximum single run for this model is 15m. 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.

Question 3

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

Accepted Answer

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.

Question 4

How long can a 48V LED strip run from a single feed?

Accepted Answer

A 48V LED strip typically doubles the run length of an equivalent 24V LED strip at the same power density, with 20 to 40 m single-end runs common at low wattages. The exact limit depends on watts per metre and copper weight, so confirm it with the DENO voltage drop calculator before specifying.

Question 5

Does a constant current LED strip really eliminate voltage drop?

Accepted Answer

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.

Question 6

What limits how long an LED strip run can be?

Accepted Answer

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.

Question 7

What is a constant current LED strip?

Accepted Answer

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.

Question 8

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

Accepted Answer

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.

Question 9

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

Accepted Answer

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.

Question 10

Does a constant current LED strip dim without flicker?

Accepted Answer

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.

Question 11

How long can a constant current LED strip run be?

Accepted Answer

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.

Question 12

Can I order a custom constant current LED strip?

Accepted Answer

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.

Question 13

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

Accepted Answer

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.

Question 14

What are the longest LED light strips DENO manufactures?

Accepted Answer

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.

Question 15

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

Accepted Answer

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.

Question 16

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

Accepted Answer

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.

Question 17

Which long outdoor LED strip lights are rated for wet locations?

Accepted Answer

Long outdoor LED strip lights are built IP65 silicone-coated, IP67 sleeved or IP68 fully potted, with DENO WAP™ conformal coating that stays clear instead of yellowing under UV. For facade and perimeter work the run length also has to survive thermal cycling, so outdoor boards use 3 oz copper and a wider PCB to spread heat.

Question 18

What makes long lasting LED strip lights actually last?

Accepted Answer

Lifetime is decided by junction temperature and solder-joint fatigue, not by the LED bin. DENO specifies 99.9% pure electroplated copper for lower thermal resistance, gold-wire bonding, and derated drive current — L90 at 50,000 hours on standard architectural builds, backed by a 5-year warranty.

Question 19

Can a long RGB or RGBIC strip run stay colour-consistent?

Accepted Answer

It can, provided each colour channel is current-regulated. On a plain long RGB LED strip the red die drops out first as voltage falls, so the far end shifts warm; a CC-regulated 24V colour board holds the mix over 15 m to 20 m. Addressable RGBIC runs additionally need data re-amplification roughly every 5 m.

Question 20

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

Accepted Answer

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.

Question 21

Can you get LED strip lights longer than 32 feet in one run?

Accepted Answer

Yes — 32 feet (10 m) is where consumer tape stops, not where the physics stops. Past that the board needs constant-current regulation and 2 oz to 3 oz copper, and DENO supplies it as one uncut length with factory-fitted lead wires rather than two reels joined by a solderless connector, which would put the whole downstream current through a spring contact.

Question 22

Should I specify a 65.6 ft or a 100 ft LED strip run?

Accepted Answer

65.6 ft (20 m) is the practical ceiling for a 24V constant-current board with 2 oz copper on a single-end feed, and it covers most cove and corridor jobs with one driver. 100 ft (30 m) moves to 36V or 48V with 3 oz copper, a bigger driver and usually a mid-point tap, because at 24V the current would be high enough for cable losses to matter.

Question 23

When is a long RGBW LED strip better than RGB on a long run?

Accepted Answer

Whenever the same run also has to serve as everyday white light. Mixing white from three colour dies costs roughly twice the wattage for the same lux and renders skin and timber poorly — a real penalty over 20 m. RGBW adds a dedicated Ra 90+ white die at 2700K to 6500K, so white comes from a white source and the colour channels stay reserved for scenes.

Question 24

Is 36V or 48V better for a long LED strip installation?

Accepted Answer

48V once a single run passes about 30 m, 36V between 20 m and 30 m or where a 48V driver is unavailable. Both stay inside SELV limits and both cut voltage drop sharply against 24V; the trade-off is the cut unit, which grows from roughly 50 mm at 24V to 100 mm at 36V and up to 166.6 mm at 48V.

LED QTY	130LEDs/m
PART NO	DL-F28A65V48-3960-*
SMD TYPE	2835
CUTTABLE UNIT	13LEDs/100mm
DIMMABLE	Yes
LED PITCH	7.7mm
PCB WIDTH	10mm
BEAM ANGLE	120°
LENGTH MAX	15m
COPPER FOIL	3oz
ON OFF TIMES	10000（test times）
POWER RANGE	2.4~24W
CIRCUIT TYPE	C.C.
INPUT VOLTAGE	DC 48V
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	99.7 lm/W	239.4 lm/m	F	79.7 lm/W	191.2 lm/m	G	—	—	—
2300 K	110.9 lm/W	266.2 lm/m	E	88.7 lm/W	212.8 lm/m	F	71.8 lm/W	172.3 lm/m	G
2700 K	116.5 lm/W	279.6 lm/m	E	96 lm/W	230.4 lm/m	F	77.8 lm/W	186.7 lm/m	G
3000 K	124.9 lm/W	299.7 lm/m	E	101 lm/W	242.4 lm/m	F	82.2 lm/W	197.2 lm/m	G
3500 K	126.8 lm/W	304.4 lm/m	E	102.8 lm/W	246.8 lm/m	F	84.6 lm/W	203.1 lm/m	G
4000 K	130.9 lm/W	314.1 lm/m	E	105.3 lm/W	252.8 lm/m	F	86.9 lm/W	208.6 lm/m	F
5000 K	130.7 lm/W	313.6 lm/m	E	105.2 lm/W	252.5 lm/m	F	86.8 lm/W	208.3 lm/m	F
6500 K	119.4 lm/W	286.6 lm/m	E	101 lm/W	242.4 lm/m	F	83.8 lm/W	201.1 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	98.1 lm/W	470.7 lm/m	F	78.3 lm/W	376 lm/m	G	—	—	—
2300 K	109.1 lm/W	523.5 lm/m	F	87.2 lm/W	418.5 lm/m	F	70.6 lm/W	338.9 lm/m	G
2700 K	114.6 lm/W	549.9 lm/m	E	94.4 lm/W	453.2 lm/m	F	76.5 lm/W	367.2 lm/m	G
3000 K	122.8 lm/W	589.4 lm/m	E	99.3 lm/W	476.6 lm/m	F	80.8 lm/W	387.7 lm/m	G
3500 K	124.7 lm/W	598.7 lm/m	E	101.1 lm/W	485.4 lm/m	F	83.2 lm/W	399.5 lm/m	G
4000 K	128.7 lm/W	617.7 lm/m	E	103.6 lm/W	497.1 lm/m	F	85.5 lm/W	410.2 lm/m	F
5000 K	128.5 lm/W	616.8 lm/m	E	103.5 lm/W	496.6 lm/m	F	85.4 lm/W	409.9 lm/m	F
6500 K	117.4 lm/W	563.5 lm/m	E	99.3 lm/W	476.6 lm/m	F	82.4 lm/W	395.5 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	96.4 lm/W	694.3 lm/m	F	77 lm/W	554.6 lm/m	G	—	—	—
2300 K	107.2 lm/W	772.1 lm/m	F	85.7 lm/W	617.2 lm/m	F	69.4 lm/W	499.7 lm/m	G
2700 K	112.6 lm/W	811 lm/m	E	92.8 lm/W	668.4 lm/m	F	75.2 lm/W	541.6 lm/m	G
3000 K	120.7 lm/W	869.3 lm/m	E	97.6 lm/W	703 lm/m	F	79.4 lm/W	571.9 lm/m	G
3500 K	122.6 lm/W	883 lm/m	E	99.4 lm/W	715.9 lm/m	F	81.8 lm/W	589.2 lm/m	G
4000 K	126.5 lm/W	911.1 lm/m	E	101.8 lm/W	733.2 lm/m	F	84 lm/W	605 lm/m	G
5000 K	126.3 lm/W	909.7 lm/m	E	101.7 lm/W	732.5 lm/m	F	83.9 lm/W	604.1 lm/m	G
6500 K	115.4 lm/W	831.2 lm/m	E	97.6 lm/W	703 lm/m	F	81 lm/W	583.2 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	94.8 lm/W	910.3 lm/m	F	75.7 lm/W	727.1 lm/m	G	—	—	—
2300 K	105.4 lm/W	1012.3 lm/m	F	84.3 lm/W	809.2 lm/m	G	68.3 lm/W	655.7 lm/m	G
2700 K	110.8 lm/W	1063.2 lm/m	E	91.3 lm/W	876.3 lm/m	F	74 lm/W	710.1 lm/m	G
3000 K	118.7 lm/W	1139.7 lm/m	E	96 lm/W	921.6 lm/m	F	78.1 lm/W	749.7 lm/m	G
3500 K	120.6 lm/W	1157.7 lm/m	E	97.8 lm/W	938.6 lm/m	F	80.5 lm/W	772.4 lm/m	G
4000 K	124.4 lm/W	1194.5 lm/m	E	100.1 lm/W	961.3 lm/m	F	82.6 lm/W	793.2 lm/m	G
5000 K	124.2 lm/W	1192.6 lm/m	E	100 lm/W	960.3 lm/m	F	82.5 lm/W	792 lm/m	G
6500 K	113.5 lm/W	1089.7 lm/m	E	96 lm/W	921.6 lm/m	F	79.7 lm/W	765.1 lm/m	G

2835 Long Run LED Strip Light (#3960)

Overview

Description

Specifications

Applications

Request a quotation for #3960

Photometric Performance — CCT × CRI Efficacy Matrix

Grade DL (2nd Tier) · 2.4W/m

Grade DL (2nd Tier) · 4.8W/m

Grade DL (2nd Tier) · 7.2W/m

Grade DL (2nd Tier) · 9.6W/m

Grade DN (1st Tier) · 2.4W/m

Grade DN (1st Tier) · 4.8W/m

Grade DN (1st Tier) · 7.2W/m

Grade DN (1st Tier) · 9.6W/m

Grade KE (3rd Tier) · 2.4W/m

Grade KE (3rd Tier) · 4.8W/m

Grade KE (3rd Tier) · 7.2W/m

Grade KE (3rd Tier) · 9.6W/m

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