a few days ago i bought a tail light/ brake light at parts america. that night i out it on. then i decided to take it out a little in the dark to see if it worked good.... the tail light worked great but the brake light is constant. i reversed the polarity of it and it worked for a little while but then the whole thing stopped working. i opened it up and one of the filements was blown, so i put a new bulb in it. but that bulb isnt bright and you cant really see the brake light during day... any1 have any suggestions of how to make it brighter ???