How does the spot lamp and transformer match?
In general, if 220V high pressure, relatively easy to break, life is not so long, if it is 12V, life expectancy is much higher than 220V.
There are points 220V and 12V, and if it is 220V, do not need transformers, if it is 12V, it must be transformers
The wattage of the spotlight must be less than or equal to the maximum power of the transformer, and must be greater than or equal to the minimum power of the transformerThat is to say, according to your example: must be between 10-35W power spotlights, not big or small.The power is too high, the transformer is burned out, the power is too small, the transformer is too light and the work is unstable.
