The lamps she designed for IKEA perfectly summarize this philosophy: a circle and a line in bent metal that applied to the wall, with the light coming out from the meeting point between the lamp and the wall. "The light is diffused, not direct. It takes up the shape of the object. It is somewhat surprising because it seems to magically emerge from the back of the lamp - duplicating its presence - which has an aesthetic value when turned off and from on".
Extracting light from things does not mean always and only designing lamps. Although he used neon a lot ("I have always preferred them to LEDs because they are light made object and they can almost be sculpted to create different atmospheres"), Marcelis has in fact furniture, accessories and objects to her credit which, thanks to the particular processing of the material they are made of, emit flashes, gleams, reflections, glimmers or reverberations.
To understand what the designer means when she talks about atmosphere, just look at the house where she lives with her family in Rotterdam (you can find it everywhere on social networks).
A decidedly minimalist space from an architectural point of view but full of objects in bright colors: canary yellow, smurf blue, harlequin green. Where a pink sofa that looks like a huge marshmallow is paired with cubes and parallelepipeds in cast and polished resin scattered everywhere (these are her famous Candy Cubes, sold in galleries), while mirrors, lamps and sculptures dot the walls.
Everything seems to be constantly changing, because light plays on every surface generating different colors and unexpected reflections.