Let’s look at what this board’s capable of doing. The output is capable of driving one to four LEDs. The real limits for the VIPer12 are two things. Number one, the VIPer12 can deliver 6 watts, so you have a maximum output capability of 6 watts. The second thing is the voltage drop on the output. This board has been designed to accommodate the typical voltage drops of one to four LEDs in series. How many 1 watt LEDs can we drive with the VIPer12 board and what’s the output voltage? The answer is the maximum drive is 6 watts, so we could drive 6 LEDs in series. The output voltage of 6 LEDs would be 6 x 4 volts or approximately 24 volts max. However, for the specific evaluation board here, the transformer would have to be redesigned to accommodate the 6 LEDs in series. The output voltage this board was designed for is driving from one to four LEDs for a maximum of 16 volts. The second example is how many 3-watt LEDs can we drive with the VIPer12 board? The answer is two. Two 3 watt LEDs would give you a total of 6 watts and that is the maximum capability of a VIPer12 board.