This LED Transformer / Driver is used to power low voltage (12v) LED bulbs & strip lighting. LED bulbs require a constant current to work properly. Sometimes a normal 12v transformer will work correctly with LED bulbs, but in some cases the lifespan of the bulb will be reduced. This LED Driver is the perfect product to replace the 12v transformer which is currently powering your existing low voltage bulbs & strip. This LED driver will power LED bulbs up to 24 watts for example if you buy 6 x 4 watt bulbs then this will power all 6 if you buy 12 bulbs you will need 2 drivers & so on. . All orders at LED HUT have a 30-day hassle-free returns & 5-year warranty our bulbs are made from the best quality components so we can give the longest warranty on the market. If this product isn't exactly what your looking for, we keep an extensive LED Transformer range in stock.