Low-voltage, systems have several advantages for the home owner: Most important, low-voltage equipment is easier to install. Except for the transformer that’s connected to a 120-volt circuit, the entire system runs on harmless 12-volt current. Low-voltage wiring is lightweight and can be laid on the ground or buried just below the surface.
Another advantage of low-voltage equipment is that it can be relatively inexpensive. And, when you do the job yourself, the bottom line for low-voltage looks even better. Not only can the capital outlay for a standard high-voltage system be much greater, but you may need to hire a pro for part or all of the installation.

900 Watt Multi-Function Transformer - AL900TPWS
Light Expressions Low Voltage Professional Landscape Lighting

Features Heavy duty 16 gauge stainless steel case
Fully programmable timer
Manual ON / OFF switch
Built in photo control option
Three sets of 300 watt terminal blocks
Heavy duty power cord
Resettable circuit breakers
Rain tight enclosure
Ground shield protection for safe operation
Lifetime Limited Warranty
CSA Certified