What Do I Need To Look For?

[Barsel]

I would like to buy an outside security light for the front of my home, but I want something different , something a bit decorative, but I want it to be bright enough to come on when someone walks up to my driveway.
It has to be mains powered, not solar or battery and preferably black in colour, but what is it that determines how bright it will be?
Is it the wattage or something else?
This coach lantern is something I like, but I don't know how bright it will be. TIA
https://www.toolstation.com/asd-4-sided-ip44-coach-lantern-100w/p33241

[Buenchico]

The light output of those units is given as 700 lumens and 840 lumens respectively. Using the table from my first link, at 1749 above, shows that to be equivalent to the light from old-fashioned 'traditional' bulbs rated at about 60W or 75W respectively. So that's much the same as the light from a bulb that you would probably have used in a hallway or bedroom.

[Barsel]

I think I'll go to Wickes and have a look at them.
Thanks for all your help Chris.