Check the fitting type and whether the light is hard-wired or plug-in. Most period-style wall lights need fixed wiring, so plan for installation by a qualified electrician if needed.
Look at the finish carefully in the photos. Solid brass, aged metal and glass shades tend to suit traditional interiors better than thin plastic or very modern shapes.
Confirm the bulb fitting and whether bulbs are included. Some vintage-style wall lights use E14 or E27 fittings, while others need specialist candle bulbs.
Check the switch type and position. Some wall lights have a pull switch, others a built-in rocker or no switch at all. Make sure it suits where you plan to use it.
Measure the space before ordering. Check height, width and projection from the wall, especially in narrow hallways and above bedside tables.