These lights were for my hallway, the 6 and the 4 for different areas and we needed downlight.
The smaller one is great in the narrow area near the door and the 6 further along where it widens.
We also needed the lights to be clear of door opening and that worked out with around 5cm to spare.
There's a special fitting tool included which is the only tricky part, it would be needed to remove and refit the light too, worth keeping in mind.