Those are quite handsome fixtures!

My perspective: excessively bright and white outdoor lighting is interfering with mating of fireflies, circadian rhythms/sleep disruption in humans (yes, currently being studied as to the effect this is having on the incidence of stroke and other disorders) and other environmental disruptions.

So I would say go for the lowest color temperature and lowest lumens that will serve necessary purpose, and also have an eye as to whether the lights will be shining into a neighbor's bedroom or even into the house across the street (as one does on my street, not mine thankfully!) Are you saying that each bulb will be 400+ lumens, and 3 bulbs per fixture?

That is interesting. Two of the fixtures have 3 bulbs and the other two fixtures have 2 bulbs. I just don't know which lumens/Kelvin to purchase for these outdoor fixtures. I was thinking 2700 Kelvin, but not sure about the lumens. Yes. it is 400 plus per bulb for the lumens.

With three lights in each fixture at the max you would be pumping out 180 watts of light ..I know LED is not the same but if you got the equivalent, it would be very over lit. Light travels much further in the dark, and you do not want to see spot every time you pull into the driveway. So I would opt of something about 25watt equivalent or less when a fixture has multi sockets you have to think of the overall output. and yes 2700 k is nice on the eyes at night.

Are these the correct base for your fixtures? https://www.ikea.com/us/en/p/rollsbo-led-bulb-e12-140-lumen-dimmable-chandelier-brown-clear-glass-80428098/