Landscape Lighting for BIG Trees

We are considering putting lighting in some large trees (40'tall and 60' width) in our yard. We live in Tulsa, OK if that matters. I am working on putting in an irrigation system and while the ditches are there, might as well put in some power to the trees for lighting.
I prefer to not mess with the low voltage lighting and transformer - prefer to just use the 110v comming straight from the house (using 12/2 UF cable). I am not opposed to using a trasformer, but it will be easier for me to just use 110v.
Can anyone recommend outdoor lighting for the trees - would like some to be pointed up and some pointed down to the ground.
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