LED Technology
LED strip lights have transformed architectural lighting design, but the quality of a strip installation depends heavily on how the strip is housed. Aluminium profiles — also known as LED channels or extrusions — are the structural and thermal backbone of any professional LED strip installation. Understanding the different profile types and when to use each one is a fundamental skill for anyone specifying interior lighting.
Bare LED strips installed without a housing have three significant problems: they look cheap, they are thermally vulnerable, and they produce visible hotspots (bright points of individual LED chips visible through diffuser covers or directly in glare). A quality aluminium profile addresses all three issues simultaneously.
The aluminium body conducts heat away from the LED chip, significantly extending LED lifetime. Heat is the primary enemy of LED longevity — a strip operating at elevated temperature will lose lumens and shift in colour temperature far faster than one that is thermally managed. For high-density or high-wattage strips, proper aluminium housing is not optional: it is a specification requirement.
Surface-mounted profiles are fixed directly to a wall, ceiling, or furniture surface. They are the most common profile type and suitable for most visible LED strip applications — under cabinets, along shelving, on headboards, and as decorative linear elements. Profile widths range from 8mm to 20mm+ depending on the strip width.
Recessed profiles are embedded into plasterboard, joinery, or concrete to create a flush, seamless appearance. When properly installed, the LED element appears to emanate from the surface itself, with no visible hardware. This is the premium specification for cove lighting, stair nosing lights, and feature wall illumination in high-end projects.
Corner profiles are angled at 45° or 90° for installation in architectural corners — ideal for highlighting where a wall meets a ceiling or for running LED strips inside furniture reveals.
Most profiles accept either a clear, frosted, or opal diffuser. Frosted and opal diffusers spread light more evenly and eliminate hotspots, making them the standard choice for cove and under-cabinet applications. Clear diffusers preserve the maximum lumen output but reveal the individual LED chips — suitable only for applications where the strip is fully concealed behind an architectural reveal.
Profile and diffuser selection should always be tested physically with the specific LED strip being used, as combinations can vary significantly in their output and visual uniformity.
LED strip installed in recessed aluminium channel — Lumitron Technologies
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