Ok, I've had like every kind of superwhite bulb for headlight turnsignal whatever, every kind of voltage 55w, 65, 70, 80, 100, 130. They will not melt your wires but over time they will burn themselves out because they generate too much heat and the headlight cannot cool the bulb adequeately. Some brands are better than others, some take days to burn out, some take months, maybe a year, but they will all burn out eventually. I've noticed the Nokyia to last the longest so far. I got so tired of buying new bulbs I went back to stocks.
Oh, by the way, if one burns out, the other headlight then draws even more current than usual so if you only buy one replacement bulb, the other will burn out very shortly after.
On another note, I even re-wired my turnsignals to stay bright all the time and blink when I turned, that didn't melt the wires either, but it did melt the headlight sort of.
smell ya later......