Material selection influences nearly every function of a lighting assembly. The housing carries structure and heat, optical materials transmit or redirect light, seals block contamination, circuit boards support electronics, and cable materials protect conductors.
Metal Structures
Aluminum Lighting Hardware
Aluminum is frequently used where a component needs both structural capability and thermal conductivity. It can be machined, extruded, cast, formed, and surface treated.
Sheet Metals
Sheet metal can provide covers, cabinets, brackets, structural frames, mounting plates, and protective panels.
Material thickness, coating, corrosion exposure, forming, joining, weight, and thermal requirements should be considered together.
Transparent Materials
Lenses, windows, diffusers, filters, and light guides can be produced using glass or transparent polymers according to optical, mechanical, thermal, environmental, and manufacturing requirements.
Optical Materials →Polycarbonate
Polycarbonate can be considered where transparent components require a combination of impact resistance, low weight, and manufacturable geometry.
Suitability still depends on temperature, chemicals, optical requirements, coatings, and the operating environment.
Sealing Materials
Sealing materials can experience compression, temperature cycles, chemicals, moisture, cleaning, vibration, and long-term mechanical loading.
Material compatibility should therefore be reviewed alongside the metal or polymer surfaces they contact.
Thermal Interfaces
Interface materials can help accommodate microscopic surface variation between a circuit board and heat spreader while contributing to the thermal path.
Thermal Design →Environmental Compatibility
Heat, cold, UV exposure, oils, coolants, cleaners, solvents, water, abrasion, vibration, and impact can affect materials differently.
Environmental selection should therefore use the real operating exposure rather than broad material assumptions.
Manufacturing
A material suitable for the operating environment must also be practical to machine, cast, extrude, mold, form, finish, bond, assemble, and inspect.
Custom Manufacturing →Selection