https://www.voltlighting.com/deals/clearance-discontinued?gclsrc=aw.ds&gclsrc=ds
We install these all the time. I don't even bother with Corona Lights or the like that rule the yardlight industry for many years unless its a light design that Volt do not carry. Don't worry about Voltage drop unless you are running a lot of lights off one transformer. the 300-400 watt transformer has more then one outputs. For example, one set can control lights in the front yard, one for the sides and one for the back yard. We have run over 20 lights off one set of outputs, that's between 2-5 watts LED. Mix and match. I am not a fan of bright yard lights, bit enough lights to see the pathways and steps. Case lights on the tree and allow that light to bounce off the tree onto the walk or path way. Keeps some areas dark and some lit enough to see is all you need. I have seen some houses that have enough lights to land a 747.
Another thing to remember, John, is if you are to run 20 lights off one output, the lights should run off a hub. Main line, 12 gauge, to a distribution hub. From there, depending on the hub, it may have 4-6 outlets to different sets of lights. Maybe one set to all the pathway lights, one set for steps, another set for lights coming off the walls (eyebrows), another spots for trees. This way, the run is shorten instead of running one continuous long wire through out the yard. They have water proof hubs too, look around.