The wood species sets the colour of the light
There is no shade in the usual sense. In a Mernøe fixture the LED is hidden inside a solid wood body and never seen directly; what reaches the table is light bounced off the timber. Sipo mahogany, walnut, elm or ash: each returns a light of a different warmth, so choosing the timber is choosing the colour temperature. The wood is the reflector, and the reflector is the design, which is why the studio offers the same four species across its whole range and leaves the rest alone.
