What is the maximum width of an LED strip that fits in this channel?

The QSG-3216 channel has an inner width of 20.5mm, designed to accommodate double-row or triple-row led strip lights up to 20mm wide.

Can this channel be cut to a custom length?

Yes, the aluminum channel and PC diffuser can both be easily cut to any custom length using a fine-toothed hacksaw or a miter saw with a blade suitable for aluminum.

How does this channel help with heat dissipation?

The 6063-T5 aluminum alloy construction acts as an effective heatsink, drawing heat away from the LED strip's components. This helps to prevent overheating and significantly extends the lifespan of the LEDs.

What makes this channel different from other black aluminum profiles?

The key differentiator of the QSG-3216 model is its generous 20.5mm internal width, which is specifically designed to house wider, high-output double or triple-row LED strips for maximum brightness.

Spec Sheet - QSG-3216

Select Channel Color:	Silver (Base), White, Black Channel (Only Have 3.28ft and 6.56ft Length)
Select Diffuser:	PC opal (60-65% transmittance) (Base), PC clear diffuser (Base), PC semi-clear (70-80% transmittance) (Base), Black PC Diffuser
Select Length:	3.28ft (1 meter) (Base), 6.56ft (2 meters), 8ft (2.44 meters), 0.5m (20inch/1.6ft), 20cm (7.87in) Sample
Availability	In Stock
Condition	Brand New

Create bold, seamless lines of high-output light with the QSG-3216 Recessed Black LED Strip Diffuser. Specifically engineered for wide, multi-row LED strips up to 20mm, this aluminum channel allows for powerful, uniform illumination without hot spots. Its integrated flange provides a clean, architectural finish by concealing any imperfections in the cutout, making it perfect for embedding into drywall, ceilings, and furniture. This versatile led light strip diffuser system, available in black, silver, and white finishes, offers both superior heat dissipation and a polished, professional aesthetic for demanding residential and commercial lighting projects.

Key Features

Extra-Wide for High-Output Strips

Features a generous 20.5mm inner width, perfect for housing powerful double or triple-row 2835 SMD flexible LED strip lights.

Flanged for Seamless Installation

The built-in flange neatly covers cutout edges, ensuring a flawless, trimless appearance when recessed into walls, ceilings, or cabinetry.

Customizable Light Diffusion

Choose from four distinct polycarbonate covers—clear, semi-clear, opal, or a unique black diffuser—to achieve your desired level of brightness and light effect.

Superior Thermal Management

Made from high-grade 6063-T5 anodized aluminum, this channel acts as a robust heatsink to effectively prolong the life of your LED strips.

Versatile Finishes & Lengths

Available in black, silver, and white finishes and multiple lengths up to 8ft to perfectly match your project's aesthetic and scale.

20mm Inner Width Recessed LED Strip Diffuser — Cross-section view of the QSG-3216 recessed aluminum profile with dimensions and components.

Product Specifications

Parameter	Details
Model	QSG-3216
Material	6063-T5 Aluminum Alloy
Surface Treatment	Anodized
Channel Color	Silver, White, Black
Diffuser Material	Polycarbonate (PC)
Diffuser Options	Opal, Semi-clear, Clear, Black
*Outer Dimensions (WH)**	31.2mm x 15.4mm (1.23in x 0.61in)
Inner Width	20.5mm (0.81in)
Compatible LED Strip Width	15mm-20mm
Installation Type	Recessed Mounted
Available Lengths	0.5m, 1m, 2m, 2.44m (8ft), 20cm Sample
Warranty	3 Years

Application Scenarios

Commercial & Retail Spaces Install in ceilings and displays of supermarkets, offices, and retail stores to provide bright, widespread general illumination. The wide channel accommodates high-lumen strips perfect for commercial-grade lighting.

Architectural Linear Lighting Embed within walls and ceilings to create dramatic, clean lines of light. The flanged design ensures a seamless, built-in look that enhances modern architectural aesthetics.

High-Output Task Lighting Use under cabinets, over workbenches, or in garage spaces where powerful, evenly diffused task lighting is critical. The wide profile ensures a broad, shadow-free light distribution.

Modern Residential Lighting Achieve a high-end, custom look by recessing these channels into kitchen islands, soffits, or custom furniture for ambient or accent lighting that integrates perfectly with the surroundings.

How to Install This Aluminum Profile

Cut the channel and diffuser to your desired length using a fine-toothed saw.
Create a groove or cutout in your mounting surface (e.g., drywall, wood panel) to the specifications of the channel body.
Insert the aluminum channel into the recessed groove. Secure with adhesive or mounting clips if necessary.
Clean the inner channel surface and adhere your LED strip light by peeling off its backing.
Connect the LED strip to its power supply and controller.
Snap the PC diffuser cover into place, starting from one end and working your way down.
Install the end caps on both ends of the profile, using the cap with the wire hole for the power connection side.

What's in the Box

✓1 x Aluminum Channel (in selected length and color)
✓1 x PC Diffuser Cover (in selected style)
✓2 x End Caps
✓2 x Mounting Clips

Frequently Asked Questions

Q: What is the purpose of the flange on this recessed lighting diffuser?

A:The flange, or lip, on the edge of the profile overlaps the mounting surface. This is ideal for recessed installations as it covers minor imperfections in the cutout, providing a clean, professional finish.

Q: Which diffuser provides the most seamless, dot-free light?

A:For the most uniform, dot-free appearance, the PC opal diffuser is the best choice, offering excellent light diffusion with about 60-65% light transmittance. The black PC diffuser offers a sleek, hidden look when off and a subtle glow when on.

Recessed Black LED Strip Diffuser For 20mm Double Row LED Strip Light