The glass crown is based on the PH multi-screen system and has four extra screens inserted between the three basic screens - all seven produced in very delicate, but also strong, Italian borosilicate glass. The screens, which are made of clear glass, are treated to appear with alternative clear and matte panels, and are positioned so that the matte panels cover the clear panels below, so that the screens can spread the light in a more diffuse way, while maintaining an aperture-free, downward light distribution. In addition, a nice, round glass cup is placed at the top to prevent dust, etc. from falling into the lamp.If you have any questions about our products, please contact us and we will reply to you within 24 hours.Product SizeSize: Dia 50cm x H 40.5cm / ∅ 19.7″ x H 15.9″DetailsMaterial: Acrylic, Metal, IronLight source: LED bulb or Edison bulbLight source base type: E26 or E27 (as shown below) Power: Max 40WVoltage: AC 110-240VMounting: CeilingEnvironment: IndoorWeight: 5kg / 11lbsIP: IP20Battery: NoDriver Required: NoFinishes: ClearProcess: Cutting, Polished, Blown glassControl method: push-button switch (Not dimmable)Q: Does it support dimming?A: Whether it supports dimming depends on what type of bulb you buy. If you buy a dimming bulb, this lamp will achieve a dimming function.The bulb provided by default does not support dimming.We provide 150cm / 59″ cable, which can be lengthened as required.