E27 screw base (bulbs not included), Power: 40W/60W Edison Bulbs or 4W/6W/8W LED bulbs This light fitting is suitable for dimmable switch but bulbs used must also be dimmable Industrial metal wall mounted light fixture with opening and closing metal cage lamp shade, the lamp holder also feature a twist ON/OFF Switch,perfect for dining room, restaurant, coffee shop, bar, club etc We also sell dimmable light bulbs, you can search the bulb's Asin: B071NTV36F Size: 10.5 cm (Diameter) x 24cm (Height), 12cm in wall mount diameter, E27 screw base (bulbs not included), adjustable knuckle joint, 90 degrees adjustable as up/down light, or 180 degrees as for a ceiling lights