A modular luminous wall panel design from London-based Isomi. Isomi appears to be a spinoff of Paul Crofts Studio that is focused on fabrication using the Krion solid surface material from Spanish manufacturer Porcelanosa.
No information on the light source but I would assume LED sign-box lighting is used. According to their site:
Available as a freestanding screen or fixed wall cladding, Light Wallcan be customised with a variety of translucent patterns, with additional options including your company name, logo or message. Produced in solid surface as a range of standard components for ease of specification and installation, Light Wall can be fitted in a variety of shapes and sizes, for both permanent and temporary use.
Spec sheet for posterity is here: Isomi Light Wall Spec
And here is a video of the designer talking about their fabrication processes: