How Convert My Pre-Lit Tree to LED

I have a pre-lit tree lit with mini bulbs at 125vac 5a 625w and i want to convert it to blue LED. I would prefer to just swap out the bulbs, but is that possible? Doesn't the power for regular bulbs and LED ones differ? I am not opposed to re-stringing the tree, but the wire has to be black, since my tree is black. Do i have to buy a blue LED string and tape off the bulbs and spray paint the wire black to achieve this, or is there an easier way to do what i want to do?