- This Holophane lamp is modernist in design - It is an assemblage of simple and harmonious geometrical forms - The mixture of opalescent glass and frosted glass on the lower part allows the wide diffusion of a soft and homogeneous light - It seems that this model was intended for workshops as well as for classrooms - Produced in the 1950s - The total height can be adjusted - The model is complete, including the central lens - The deflector is an assembly of frosted glass worked in concentric circles for a rounded diffusion of light - The upper part consists of a perforated sheet - The electrical components remain functional - 30cm in height of the diabolo in perforated sheet metal