We carry good stocks of lamp holders to suit Edison Screw bulbs, these large screw bulbs use a larger lamp holder which fitslarger diameter lampshades with a 40mm aperture in the top. Bulbs to suit these lamp holders are usually labelled as ES or E27 & are a more secure option to the bayonet holder. These lamp holders have smooth, plain skirt which are perfect for when you want a clean minimal look when having an exposed light bulb.