... LED module use as channel letter 4.CE&RoHs The best choose Maxware LED channel letter Features: 1. ... 5. Full aluminum heat dissipation, low temperature rise, the strict high and low temperature experiments, higher reliability 6 ... to 10- 20pcs a string,use on the light box as the backlit,also can be lighting,decorate light ... 20AWG cable, yellow or gray wire for the positive anode, white wire is negative