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A LED driver is an electrical device that regulates the power to an LED or string(s) of LEDs. What makes a driver different from conventional power supplies is that an LED driver responds to the ever-changing needs of the LED, or circuit of LEDs, by supplying a constant amount of power to the LED as its electrical properties change with temperature.
The brightness, and optimal evenness of light output and actual life of the LED globe is dependent on the transformer you use for 12v lighting. Generally wire wound (Iron Core) transformers will successfully run most LED globes, however they do not produce the best results - Using Electronic or Iron Core transformers, not only void our LED warranty they also cut the LED life from 50,000 hours to around 43,000 hours.
Most cheaper electronic transformers used to power halogen globes will not run LED globes at all. Typical tell tale signs of the faults seen are a noticeable flickering. Many electronic transformers have a "VA" rating or a load rating "20-60" stamped on them. If this is the case they will not recognize a load of only 4watt , 3x3watt or 10watts.
In general terms you'll be much better positioned to change to actual LED transformers, this enables you to take full advantage of low voltage lighting and maximum savings in the long run. LED transformers will use far less energy and run much cooler than traditional standard electronic or wire wound transformers.
This is why all LED OUTDOOR lighting should only be used in conjunction with appropriate LED drivers.
