This Lumicube 'soft-glow' lampshade is made from translucent white Perspex, & contains two cylindrical gel filters, one frost white & one coloured. When this lamp is turned off, the colour within the cube is almost invisible (see last photo). When the lamp is switched on, the cylinder colour is revealed creating a coloured ambient light & also a white downlight with a halo effect on the underside of the cube. Designed to fit a standard UK (28mm BC) or European/USA (40mm/1.6 inch ES) pendant lamp holder. This Lumicube is a 175mm cube with a circular hole in the underside for lamp access & for removal of the coloured gel filters. Available in a range of colours: pink, red, orange, yellow, green, turquoise, blue, purple & white (without a coloured gel filter). Note: in response to requests I've temporarily added to this listing; options for Red/coloured Perspex & also a new size option of 25cm. I will create a new listing for coloured Perspex lampshades when I have some images ready. 2006 - 2018 Michael Seal, Lumicube.com Orange & Other Hot Colours - Cube Lampshade - Translucent Perspex Containing A Blue, Turquoise, Orange, Or Pink Coloured Gel Filter