120V Landscape Lighting

[Dave Hembree]

I know 12V might have been the better option, but while I was digging
ditches for a sprinker system, I went ahead and put 12-2 120V cable in
the ground (it was the proper type for direct burial - I put most in PVC
for extra caution).

The only items on this particular circuit are the irrigation controller
and the landscape lighting.

So my questions are:
1) How many floodlights can go on this circuit? I am using Red Dot
fixtures on the trees - installing them about 10 ft up the tree trunks
for uplighting. Each floodlight has 2 bulbs - I have been using 45W and
a few 90W bulbs. The 90W are pretty bright - so will likely change
most to be 45W.

2) Will the lights at the end of the run be less bright than the lights
nearer the power source? I have one run that is likely around 150'.
Will this light even work that far from the source - again, I used 12-2
wiring for all the runs.

Thanks!