I'm going for a full LED bulb conversion in my Cat. I put in some Jam Straight side marker lights and they look great. Today I received my 57 LED rear turn signal bulbs 7507. I put them in and nodda. Wouldn't light up. I found that I'm going to have to put in load resistors to get them to light up. Anyone got an idea of I need a 25 or 50 watt resistor?