Question 1

What makes a full spectrum LED strip different from a normal high CRI strip?

Accepted Answer

A high CRI board raises the average of eight pastel test colours; a full spectrum LED strip reproduces a continuous 380–780 nm curve with no cyan gap and a low blue peak. DENO builds them at Ra 95+ with R9 above 90, so saturated reds, timber and skin tones render as they do in daylight rather than simply scoring well on a datasheet.

Question 2

Is a violet-excited full spectrum LED better than a blue-chip white LED?

Accepted Answer

For colour fidelity, yes. A violet-excited LED pumps a multi-phosphor blend with a ~405 nm die, filling the 420–500 nm region that a 450 nm blue chip leaves as a spike and a dip. The trade-off is efficacy: expect 80–110 lm/W instead of 130–150 lm/W. Blue-pump Ra 95 remains the better choice where lumens per watt drive the energy calculation.

Question 3

What CRI and R9 values do your full spectrum LED strip lights reach?

Accepted Answer

Standard production is Ra 95+ with R9 greater than 90, typically TM-30 Rf 93 and Rg around 100. Every reel ships with spectral test data, and 1-SDCM binning is available when several reels must match visually in the same room. Ra 98 selections can be produced for gallery and film work on a project basis.

Question 4

Which full spectrum model should I choose for a shallow cove?

Accepted Answer

Pick density by mounting depth: with 6–12 mm between board and diffuser the 8 mm 256 LEDs/m 2216 build at 3.9 mm pitch stays dot-free, while the 10 mm 128 LEDs/m board is the efficient choice behind deeper profiles. For runs that must not drift in brightness, the 12 mm constant-current board regulates each segment independently.

Question 5

Are full spectrum LED strips available in 24V and are they dimmable?

Accepted Answer

All five DENO full spectrum boards are 24V, which keeps current low enough for 5 m single-feed runs and 10 m with dual feed. They dim on PWM, 0–10V, DALI and TRIAC drivers down to 1% without colour shift, because the phosphor blend is fixed rather than mixed from separate colour channels.

Question 6

Can full spectrum LED strip lights be used for plants or human-centric lighting?

Accepted Answer

Yes for both, within limits. The continuous spectrum supports supplementary horticulture and human-centric schemes where a magenta grow bar would be unacceptable, and melanopic content is tuned by CCT rather than by adding a channel. For dedicated high-PPFD growing, a purpose-built horticultural board is still the more efficient option.

Question 7

Can I order a custom full spectrum LED strip — width, CCT or IP class?

Accepted Answer

Board width from 8 mm to 20 mm, 1800K–6500K including dual-CCT tunable white, 2 oz or 3 oz copper, free-cut segmentation and IP20 to IP68 protection are all configurable on the existing full spectrum stack-ups, so a non-standard build is a production setup rather than new tooling. MOQ and lead time are quoted per specification.

Question 8

What wavelength range does the spectrum actually cover, and is the cyan gap really filled?

Accepted Answer

Emission runs continuously from 380 nm to 780 nm. On a violet-pump board the 405 nm die feeds a three-phosphor blend, so the 480–500 nm cyan region sits within roughly 15% of the neighbouring bands instead of collapsing into the dip a 450 nm blue chip leaves. Measured SPD files (5 nm resolution), TM-30 Rf/Rg and the duv figure ship with each production lot, so the curve can be verified rather than assumed.

Question 9

Which colour temperatures are available, and can the CCT be tuned after installation?

Accepted Answer

Fixed CCT options run 1800K, 2200K, 2400K, 2700K, 3000K, 3500K, 4000K, 5000K and 6500K, all held inside a 3-SDCM ellipse and 1 SDCM on request. For adjustable schemes a dual-channel tunable board mixes two full-spectrum phosphor sets, so 2700K–6500K tuning keeps Ra 95 across the whole travel — unlike RGB-based tuning, which loses fidelity away from its calibration point.

Question 10

Where is a continuous-spectrum board worth the efficacy penalty?

Accepted Answer

Museums and galleries (low UV, faithful pigment rendering), fashion and jewellery retail where saturated reds decide a purchase, dermatology and dental rooms, food halls, colour-grading suites and photo studios, plus high-end residential where timber and skin tones dominate. In warehouses, car parks and back-of-house corridors the 30–40% efficacy gap is not justified — a blue-pump Ra 80 board is the correct specification there.

Question 11

How does the spectrum affect flicker, UV and blue-light exposure?

Accepted Answer

A 405 nm pump sits below the 450 nm blue-hazard peak, so the RG0 exempt-group rating is easier to hold at the same lux; UV-A leakage beyond the die is filtered by the phosphor layer and measures below 2 µW/lm, which suits archival display. Flicker is a driver property, not a spectral one: on constant-current segments DENO measures Pst LM below 1.0 and SVM below 0.4, so the same board stays camera-safe.

Question 12

Can a continuous-spectrum board be built waterproof or in long outdoor runs?

Accepted Answer

Yes. IP65 silicone coating, IP67 extrusion and IP68 filled builds are all available, and the phosphor blend is unaffected by the encapsulation because it sits under the LED lens. For long façade or landscape lines the 12 mm and 20 mm constant-current versions hold brightness across 10 m per feed, and 48V variants extend that further where trenching cost dominates.

Question 13

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 14

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 15

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 16

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 17

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 18

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 19

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 20

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 21

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 22

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 23

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 24

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 25

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.

LED QTY	256
PART NO	DL-F28A128V24-5871-F-*
SMD TYPE	2835
CUTTABLE UNIT	8LEDs/31.25mm
DIMMABLE	Yes
LED PITCH	7.8mm
PCB WIDTH	20
BEAM ANGLE	120°
LENGTH MAX	5m
COPPER FOIL	3oz
POWER RANGE	3.8~46W
CIRCUIT TYPE	C.V.
INPUT VOLTAGE	DC 24V
OPERATING TEMPERATURE	-25~40°C;Tc：75°C（max）

2835 Full Spectrum High Light Efficacy LED Strip Light (#5871-F)

Description

Specifications

Photometric Performance — CCT × CRI Efficacy Matrix

Grade DL (2nd Tier) · 8W/m

Grade DL (2nd Tier) · 15W/m

Grade DL (2nd Tier) · 23W/m

Grade DL (2nd Tier) · 28.8W/m

Grade DL (2nd Tier) · 40W/m

Grade DN (1st Tier) · 8W/m

Grade DN (1st Tier) · 15W/m

Grade DN (1st Tier) · 23W/m

Grade DN (1st Tier) · 28.8W/m

Grade DN (1st Tier) · 40W/m

Grade KE (3rd Tier) · 8W/m

Grade KE (3rd Tier) · 15W/m

Grade KE (3rd Tier) · 23W/m

Grade KE (3rd Tier) · 28.8W/m

Grade KE (3rd Tier) · 40W/m

Full Spectrum LED Strip — Buyer Questions