FE Design. The collection is made up of recessed lighting fixtures. The metallic structures can be either fixed or adjustable, and are in polished aluminium or powder-coated in white. Their simple, pure shape makes these lamps very versatile and suitable for use in any type of public space or the home, also due to the fact that they are suitable for use with many different light sources. Some spot lights are dimmerable which not only allows the brightness to be turned down but also changes their colour to create a warm or cold light. The lamps run on mains power with LED bulbs.