The bodies of the Thema range T1 and T2 comprise a rim and a cover made of high pressure die cast aluminium. The Thema 1 version includes a gravity die cast aluminium base and two (2B) or four arms (4B) linking the body to the base.
Diffuser and bowls
In Thema 1 version, the diffuser is in high resistance (MI) injected methacrylate or injected polycarbonate (PC) and UV protected.
The Thema 2 version has a thermoformed methacrylate (MT) or heat treated flat glass bowl (V). The bowls are fixed to the rim by 8 tightening brackets that press on a watertight gasket.
Optical systems
Thema can be equipped with 3 different optical systems fixed to the cover: a circular, brilliant, anodised optic in pressed aluminium OC, a 3eR road optic and a 3eU urban optic in hydro-formed, brilliant, anodised aluminium.
The Thema T1 model contains a reflecting cone in the lower section.