The thing nobody tells you about black outdoor lights is that they disappear in daylight. You mount one expecting it to be a feature on the wall, and for ten hours a day it's just a dark shape you stop noticing, which is exactly why it works. It's only at dusk, when the bulb comes on and the fixture itself goes almost invisible against the shadows it's casting, that you understand what you paid for. Nobody mentions that part in the shop.
In an ordinary house this sits well against brick, dark painted trim, stone, even plain stucco, because black reads as a shadow rather than a decoration, so it doesn't fight with whatever is already going on around your door. It looks right next to house numbers, next to a wood or dark painted front door, next to iron railings if you have them. Where it struggles is on pale render or white clapboard in full sun, where instead of disappearing it turns into a hard little blob stuck on the wall, and no amount of styling fixes that, you just notice it every single time you pull into the driveway.
The honest limits matter here too. These are not a fix for a porch that's actually dark, a 40 watt bulb in a decorative fixture is for ambience and for finding your keys, not for lighting a path or reading a package label at night. If you need real light to see by, you want something brighter and probably motion activated, and a pretty black lantern by the door is a second light, not your only one. I learned that the hard way after putting one up and still tripping over a delivery box for two months before I admitted I needed a flood light as well.
Sizing is where most people guess and get it wrong. Hold a piece of cardboard cut to the fixture's actual height against the wall before you buy, at the height it will hang, and stand back on the sidewalk to look at it properly, not just from the doorstep. As a rough rule, a fixture for a front door should be roughly a third of the height of the door frame, bigger if you have a double height entry, smaller for an apartment landing or a narrow side door. The mistake is buying something that looked substantial online and arrives looking like a doll's house lamp next to a six foot door. Check the mounting plate too, some are wider than old fixtures and will cover old screw holes, which saves you a repaint.
These suit older homes with some texture to them, farmhouses, brick terraces, cottages, anywhere with a bit of age or weather already written into the walls, and they come into their own in autumn and winter when they're lit for longer hours and the contrast against bare branches or snow does half the work for you.