Once upon a time, I fell victim to the hype about low-voltage yard lights. After drilling through the brick, burying cables, poking mushroom fixtures into the ground and installing transformers, the lights looked OK at first.
Little did I know that the bulb sockets corrode, the bulbs burn out and the plastic fixtures become brittle and break.
The entire installation was eventually replaced with line-voltage fixtures, using ordinary Halogen light bulbs, connected to a timer and dimmer.
There were a couple of disadvantages to the second method too. The light bulbs were visible and and not comfortable to the eye. The power consumption of about one Kilowatt was also noticable on the electric bill.