What’s the difference between an LED driver and a transformer?

Almost all transformers are constant voltage. 

For LED applications that require a constant voltage Power Supply, which includes MR16 spotlights (12V) and LED Strip Lights (12V/24v), there is a great similarity between LED constant voltage drivers and standard transformers. 

LED lighting applications may require specific parameters/specifications in relation to flicker, ripple, reliability, efficiency, surge protection and dimming. 

Should I use an led driver or a Transformer? 

If you are looking here for the answer then either will probably do, but make sure you know whether your LED application requires a Constant Current or Constant Voltage power supply. 

Do LED light strips require an LED Driver or a transformer? 

It usually doesn’t matter! 99% of LED strips sold require a constant voltage supply and are usually supplied with basic AC/DC transformers, but may also be supplied with LED Drivers 1% of LED strips sold operate with constant current, and these require an LED driver.

Do MR16 LED spotlights require an LED driver or a transformer? 

It doesn’t matter! 

LED MR16 spotlights require a constant voltage power source. This is usually 12V DC but many will also accept 12V AC too.