I am building an led matrix having 75 SMD 2835 60mA leds. I am connecting 3 in series with a resistance and then connecting the 25 series parallely to a 12V power source supplying 3A@12V. This means that 120mA will be divided among the 25 series, will this set up burn up the leds. Also what value of the resistance will i need to connect to the 3 leds in series?