LED low voltage lighting is definitely the wave of the future. It provides the same lighting coverage at a fraction of the cost in terms of power use, plus the LED bulb last for many more years before replacement. This will more than easily pay for itself over the term of the LED bulb life cycle, in energy savings and replacement costs (over a typical standard halogen bulbs). Make the change, typical halogen bulbs operate for perhaps 500 reliable hours, LED bulbs can last 30K hrs.
Received the 12v led bulbs very quickly. Bulbs were a perfect fit to convert my landscape lighting.