For backlighting natural stone likeOnyx, Quartzite, or Marble in 2026, the industry has shifted away from DIY light boxes toward custom-fabricated LED light panels. These are engineered to provide perfectly uniform light at thicknesses as thin as 6mm to 8mm.
Here are the best ways to source and specify custom-sized LED panels for your project:
1. Top Custom Manufacturers
If you are looking for professional-grade, “turn-key” panels that arrive cut to your exact dimensions, these companies are the industry leaders:
GlowbackLED (USA): Known for “frameless” custom panels. They offer white, Tunable White (2700K–6000K), and RGBW. Their panels are only 5/16″ thick, making them ideal for tight backsplash or countertop installs.
MAX ILLUMINATION (CHINA): High-end commercial solution specifically marketed for backlighting Onyx countertops. Shop & Retail Shelf LED Backlight Panel with competitive price
ThinLight Technologies (USA): They specialize in large-format panels (up to 6.5′ x 13.5′ in a single sheet). Their laser-etched acrylic technology ensures that even a massive stone slab has no dark spots in the center.
Addlux (UK/Europe): Offers some of the thinnest sheets on the market (3mm). Their sheets are unique because they can be manufactured in bespoke abstract shapes, not just rectangle
How Acrylic LGPs Work
An LGP is a clear optical-grade acrylic sheet. LEDs are embedded into the edges, and the light is “guided” across the lumisheet.
The Science: Thousands of microscopic matrix grids on the acrylic surface “disrupt” the light, forcing it to exit the face of the panel toward the stone.
The Result: A perfectly even glow across the entire slab (Onyx, Quartzite, etc.)
with zero “hotspots” or visible light strips.
