
Second-generation HCL precision — UGR <13 across three aperture sizes and two IP ratings
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
Move the control to see melanopic output across the tuning range.
M/P Ratio
0.43–0.78 @ 3000K–5000K (chip & CCT dependent)
Melanopic DER, CIE S 026:2018, across the tuning range
Design target
Percent Flicker
<5% (low-ripple driver required for Bridgelux Thrive)
Across the dimming range; IEEE 1789-2015 no-risk region
Design target
SVM
<0.4 (Bridgelux Thrive + matched driver)
Stroboscopic visibility measure (SVM); EU Ecodesign Regulation 2019/2020 limit 0.4 at full load; test method IEC TR 63158
Design target
Colour Shift
<0.002 over full dimming range
At 6 000 h, Ta 25 °C
Design target
SDCM
≤2 SDCM (CREE / OSRAM) / ≤1 SDCM (Bridgelux Thrive)
MacAdam ellipse, initial, ANSI C78.377
Design target
TM-30-20
Fidelity and gamut index, ANSI/IES TM-30-20
Design target
CRI Ra
CRI ≥90 / ≥95 / ≥98 (chip selectable)
Measured at 4000 K reference point
Design target
Glare · UGR
< 13
4H8H, transverse viewing
Design target
02 — 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
12W
FLUX
1620 LM
CCT
2700K / 3000K / 4000K / 5000K
ENVELOPE
Ø55 – Ø150 mm (three aperture sizes)
FINISH
Sand Gold · Pearl Black · Black · White · Silver · Chrome
Individual model dimensions, mounting type and per-SKU datasheets are issued on request while the model schedule is finalised.
Request the model schedule03 — Verification
Single source of truth. Nothing here is repeated elsewhere on the page.
05 — Resources
Send the room schedule — we return a BOM, driver and control topology, and the spec sheets for each SKU.