Apparatus for lighting; Apparatus for lighting buildings; Apparatus for lighting powered by electricity; Diffusers being parts of lighting apparatus; Diffusers being parts of lighting installations; Electric apparatus for lighting; Electric indoor lighting apparatus; Electric indoor lighting installations; Electrical apparatus for lighting; Electrical appliances for lighting; Electrical installations for lighting; Electrical lighting fixtures; Indoor electrical lighting fixtures; Installations for electric lighting; Installations for lighting; Light-emitting diode (LED) lighting apparatus; Lighting (other than for medical photographic use); Lighting apparatus and installations; Lighting apparatus for architecture; Lighting apparatus for commercial use; Lighting apparatus for industrial use; Lighting apparatus utilising light emitting diodes (LEDs); Lighting elements; Lighting fixtures; Lighting fixtures for commercial use; Lighting installations; Optical apparatus for lighting purposes; Reflectors adapted for lighting apparatus; Reflectors for use with lighting apparatus