Is the myth about sunlight killing vampires not a actual myth and does electricity effect them?

In Being Human the vampire Mitchell can go outside in sunlight, though he needs to wear sunglasses, does that mean that the myth about vampires combusting in sunlight is not necessarily a solid fact?

And how would someone bind a vampire? Has shock collars ever been used to bind a vampire and would it be effective? Also, could vampires be just like ordinary humans who don't age or die in certain ways and need to drink blood?