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YWX Surface Downlight 200 mm 20W IP65 — HCL Configuration
YWX Surface Downlight 200 mm 20W IP65 — HCL Configuration
YWX

YWX Surface Downlight 200 mm 20W IP65 — HCL Configuration

L200 × W200 × H39 mm IP65 surface downlight · SUMLINK HCL configuration

CCT Range
2700K – 6500K Tunable White (HCL engine)
Colour Rendering
CRI ≥95
Efficacy
131 lm/W (HCL engine, design target)
Output
2,620 LM @ 4000K
Request BOM & Spec SheetsDatasheet (PDF)
01 — Why it qualifies as HCL

Circadian performance, stated as measurable numbers

Tunable white is a colour feature. Human Centric Lighting is a measurement obligation. Below are the quantities a lighting designer needs to model BY001 against WELL v2, CIE S 026 and IEC TR 63158 — including the ones still awaiting third-party verification.

Melanopic response across the tuning range

2700
3000
3500
4000
5000
5700
6500
Below WELL v2 L03 daytime threshold at the lowest setting
At 2700 K
0.45
M/P Ratio
225
Mel-EDI @ 500 lx

Move the control to see melanopic output across the tuning range.

M/P Ratio

0.40–0.90 across 2700K–5000K (design target)

Melanopic DER, CIE S 026:2018, across the tuning range

Design target

Percent Flicker

< 1% (low-ripple driver, IEEE 1789 NOEL)

Across the dimming range; IEEE 1789-2015 no-risk region

Design target

SVM

≤ 0.40

Stroboscopic visibility measure (SVM); EU Ecodesign Regulation 2019/2020 limit 0.4 at full load; test method IEC TR 63158

Design target

Colour Shift

< 0.003 over full dimming range

At 6 000 h, Ta 25 °C

Design target

SDCM

≤ 2 SDCM

MacAdam ellipse, initial, ANSI C78.377

Design target

TM-30-20

Rf ≥ 95 / Rg ≥ 100

Fidelity and gamut index, ANSI/IES TM-30-20

Design target

CRI Ra

CRI ≥95 (Bridgelux Vesta Thrive TW)

Measured at 4000 K reference point

Design target

Glare · UGR

< 19

4H8H, transverse viewing

Design target

SUMLINK Verified — values marked Design target are engineering design values from the driver and LED platform specification, not yet confirmed by independent laboratory report. Verified values are backed by a test report available on request. We publish the distinction rather than the marketing number.
[{"k": 2700, "mp": 0.4, "edi": 200, "note": "Deep warm — evening close, M/P below the WELL v2 daytime threshold."}, {"k": 3000, "mp": 0.43, "edi": 215, "note": "Residential warm white."}, {"k": 4000, "mp": 0.6, "edi": 300, "note": "Mid-arc reference; colour metrics stated at 4000K."}, {"k": 5000, "mp": 0.78, "edi": 390, "note": "Stated M/P 0.78 — morning activation."}, {"k": 6500, "mp": 0.9, "edi": 450, "note": "Maximum melanopic output; short exposure only."}]

02 — Selection

Model selection

Per-SKU dimensions and profiles are released with the BOM. Below is what is confirmed today.

Finish ● Black ○ White · All models 2700–6500 K

POWER

20W

FLUX

2,620 LM @ 4000K

CCT

2700K – 6500K Tunable White (HCL engine)

ENVELOPE

L200 × W200 × H39 mm

FINISH

Matte Silver | Black | Gun Black | Bright Silver | Champagne Gold | Rose Gold

Individual model dimensions, mounting type and per-SKU datasheets are issued on request while the model schedule is finalised.

Request the model schedule

03 — Verification

Full specification

Single source of truth. Nothing here is repeated elsewhere on the page.

Photometric
01
Luminous flux
2,620 LM @ 4000K
Efficacy
131 lm/W (HCL engine, design target)
CCT range
2700K – 6500K Tunable White (HCL engine)
Chromaticity
≤ 2 SDCM
CRI Ra
CRI ≥95 (Bridgelux Vesta Thrive TW)
R9
R9 > 90
Duv
< 0.003 over full dimming range
Distribution
60° (fixed)
Circadian & visual comfort
02
Melanopic DER
0.40–0.90 across 2700K–5000K (design target)
Percent flicker
< 1% (low-ripple driver, IEEE 1789 NOEL)
SVM
≤ 0.40
Electrical & control
03
Power
20W
Protocol
Matter over Thread (LTECH Matter CC driver, 2CH tunable white)
Dimming range
0.1% – 100%
Physical & installation
04
Finish
Matte Silver | Black | Gun Black | Bright Silver | Champagne Gold | Rose Gold
Dimensions
L200 × W200 × H39 mm
IP rating
IP65 (housing)
Lifetime, compliance & warranty
05

05 — Resources

Downloads

Product datasheet
AVAILABLE ON REQUEST
IES / LDT photometric files
AVAILABLE ON REQUEST
Installation & control-device wiring
AVAILABLE ON REQUEST
BIM / Revit family
AVAILABLE ON REQUEST
Test reports (Verified metrics)
AVAILABLE ON REQUEST
Warranty & compliance
AVAILABLE ON REQUEST

Specifying this fixture on a live project?

Send the room schedule — we return a BOM, driver and control topology, and the spec sheets for each SKU.

Request BOM & Spec SheetsTalk to a specifier
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