Short answer: honey onyx usually looks best at 2700K warm white, white marble at 6000K cool white, and white onyx in between — test 3000K for softer white and 6000K for crisper white. These are starting points from general stone guidance, not a rule for your slab: lock the choice only by testing a sample behind your actual stone at your planned depth.
Honey onyx: start warm
Honey onyx wants warm light. A 2700K warm white deepens the amber and gold already in the stone and makes veining look richer, not washed out. Cool white fights the stone, flattening amber and making the panel look pale and cold. Lighter, more golden slabs: still start at 2700K, checking warmth brings out the colour or pushes it toward orange.
White marble: start cool
White marble is the opposite case. Start at 6000K cool white to read white: it keeps the base white and grey veining sharp. Warm white is the most common disappointment here — 2700K can make white marble look yellowed even when it looks perfectly white in daylight. Test 3000K only if the room itself is warm, side by side with 6000K on the same slab.
White onyx: decide what “white” means to you
White onyx needs a decision first: crisp white, or softer white? For crisp white, start at 6000K; for softer white, start at 3000K. Warm 2700K will usually push white onyx toward cream or pale yellow, so choose it only if that creamy look matches warm joinery. Because white onyx is highly translucent, test on a piece large enough to show the veining, at your planned depth — a small offcut is not enough.
A quick comparison
| Stone | Start your test at | Watch out for |
|---|---|---|
| Honey onyx | 2700K warm white | Cool white flattening amber |
| White onyx | 3000K soft, 6000K crisp | 2700K turning panel creamy |
| White marble | 6000K cool white | Warm white yellowing marble |
Test at the depth you plan to use. As a starting point, high-density sheets sit in a 30–50mm band and standard sheets around 50mm, but the final result always depends on a sample test with the real stone. For hiding individual light points, see the distance guide for stone and acrylic.
Pick a sheet that lets you test, not just one that locks you in
The BG-0318 RGBCCT sheet carries two white channels — 2700K warm and 6000K cool — on one 2835 sheet (640 LEDs, 490×245mm, 24V, 50W, Ra>95, 6 cores: V+/R/G/B/warm/cool). Torn between warm and cool, or fitting white onyx? That dual-white option lets you compare both on the installed panel before committing.
The BG-0313 RGBW sheet is different: 512 LEDs, 45W, 5 cores, white limited to either 3000K or 6000K, so pick one before ordering. The BG-2002 single-colour sheet (288 LEDs, 610×305mm, 30W, Ra>95) is fixed the same way. A normal RGB controller is 3-channel and cannot drive the two white channels of a 6-core RGBCCT sheet, so pair RGBCCT with an RGBCCT controller. Size driver and controller for the whole panel, as large panels splice multiple sheets together: driver power at least total LED power divided by 0.8, controllers normally run at 70–80% of rating. Allow 6mm at the connector and 2mm at the glowing area (1.6mm thick, connector 5.6mm). Sheets carry a 3M adhesive backing. See the flexible PCB LED light sheet product page.
Before you order
- Test your actual slab, not a photo or different batch, at planned depth and in room lighting.
- Honey onyx: confirm 2700K reads amber, not orange; white marble: confirm 6000K reads white.
- White onyx: decide crisp or soft white before picking a sheet; if undecided, favour dual-white RGBCCT.
- Confirm the certifications required for your market when ordering.
FAQ
Can I change colour temperature after installation?
Only if the sheet allows it. A dual-white RGBCCT sheet such as the BG-0318 switches between 2700K and 6000K with the right controller. A single-white sheet locks the choice at ordering.
Why does my white marble look yellow under warm light?
Warm light adds yellow to a white base, and white marble shows that shift clearly — hence 6000K as the starting point. If yellow only at night, check warm room lighting mixing with panel light.
Is a small offcut enough for a colour test?
For direction, yes. For a final decision, no: veining, thickness variation and edge effects only show on a larger piece, judged at full size and planned depth.
Choosing between these three stones, or already holding a slab? Send the stone type, panel size and the look you want — crisp white, soft white, or warm amber — and request a quote or a sample.