Thank you for the feedback, over the last 4 years our tops have had two major upgrades and are as you describe with rounded top and also a powersaving mode for winter months or poor panel location. The new tops can be seen here
Our updated XT series comes with Powersaving technology as standard and includes several other important updates to the London, Durham and Canterbury design. Powersaving mode gives you the option to reduce the brightness of the light slightly in return for doubling the runtime each night which is ideal for customers that don't have a great solar panel location in their garden.
The XT series also benefits from a redesigned top piece which houses the solar panel, batteries and SMD bulb. The updated design has eliminated the potential for water ingress and the solar panel output has been increased significantly. A waterproof housing has also been added to the underside of the XT series top which shelters the batteries and circuitry from ambient moisture.
|Product ID: SS9892|
|Weight: 1.53 kg|
|Product Barcode: 5060188641674|
In the Box
The Durham is rated at 12 lumens, I'm afraid I don't understand the 2nd part of your question.
The P setting stands for Powersaving and will slightly reduce the brightness but double the runtime of the light at night. It's good to select this if the panel isn't in the best location or over the worst period of winter. The S setting is for standard mode and it will run on maximum brightness.
Yes, they are available here.