Fixing up Light

The light in our kitchen bathroom was not working.  I tried to fix it but could not.  This morning, I bought the replacement bulb holders and changed them.  The wires are very sharp and prick into my thumb.  Also I may have step onto a fragment as well because my sole had a sharp pain.  I rub it thinking I got rid of it but it still give sharp at certain angle of my foot step.  Anyway, after replacing the porcelain light bulb holder, it works.  I am pleased that I can do handy work.  Total cost of repair is $3.50.