Run through these quick checks before you buy:
Shade: check material (glass, metal or acrylic), colour and how the shade directs light. A green glass bankers-style shade casts a classic downward glow; metal shades give more focused task light.
Finish: confirm whether the finish is brass, brass-effect or another coating, and check photos of the base and stem closely.
Arm and base: an adjustable arm should hold position without sagging, and the base should be heavy and stable enough not to tip in daily use.
Bulb fitting and switch: confirm the fitting (often E27 Edison screw or B22 bayonet) and that the switch position suits your seating position.
Cable length and desk size: check cable length, total height, base diameter and shade width against your desk space.
Delivery and returns: Amazon UK delivery and returns terms vary by seller, so check the listing and Amazon's returns policy before ordering.