Can try Redguard Chandeliers and/or Alinor Sconces, if you want it quite bright.

Or Breton Torches.

There's a variety of light sources you can use.

You can look through the items in the lighting section, for something suitable, here:

https://eso.mmo-fashion.com/furnishings-by-type/

Bear in mind, some are brighter and/or have a bigger light spread than others.

On the whole, go for the larger flames, over the candles, for brightness and spread.

For example, the Nord Chandeliers are nice, but they won't provide as much light as the Redguard ones.

Oh and it's normally good to put a selection of lights, at various different heights and positions.

So, you could combine chandeliers with sconces/torches and braziers, for example, so the light isn't all coming from one place/height.