Transformer (Max 60W) Including timer and light sensor. The 12V - 60 W transformer is splash-proof and suitable for outdoor use. The transformer ensures that the voltage of the power outlets is compliant for use with all Lightpro light fixtures. This transformer is suitable for 12v light fixtures with a power consumption of up to 60W. Are you looking to buy a transformer? If so, first determine how many light fixture you want to install in your garden.