Check the whole section before machining

The internal strip space and external channel width are different dimensions. A strip can fit inside the channel while the connector does not. The cover may also need a removal direction that becomes impossible after the shelf is fitted.

Drawing itemCheck before approval
Internal baseStrip and connector clearance
External body and flangeGroove width, depth and furniture structure
CoverInstallation/removal direction and optical choice
End capsAdded length and cable exit
FixingsClip or screw clearance and service access

Optics and cooling require different evidence

A deeper channel can change the visible source pattern, while the cover changes transmission and distribution. Neither effect is established just by calling a product “opal” or “deep”. Compare the offered parts with the chosen strip.

Aluminium can form part of a heat-transfer path. Performance depends on contact, strip power, profile geometry, mounting and surroundings. Do not treat any small channel as a guarantee of thermal suitability, or claim that a metal profile is mandatory for every strip without its instructions.

A useful order line

Identify the profile reference, cover, finished length, end-cap types, cable exit and fixing set. Add the strip reference and furniture-section revision. If machining or assembly belongs to a different supplier, state that boundary so a bare extrusion is not mistaken for a finished lighting module.

For a floating shelf, ask how a failed strip or damaged cover will be replaced after installation. A neat prototype is incomplete if the service route requires destroying the shelf finish.