This lamp from Elstead Lighting can be dimmed to set the level of lighting just the way you like it. This lamp should be used outside and you should not use bulbs with more than 100W.
From Debenhams
Kinsale 1 Light Outdoor Coastal Pedestal Lantern Black IP44 E27 - One Size
Fruugo
Elstead Lighting Kinsale 1 Light Outdoor Coastal Pedestal Lantern Black IP44, E27