led taillight replace

a friend bought a slew of 1157 replacement bulbs and the stop lites where all clustered at the top of the bulb while the tail lites where on the circumferance. and in his case the bulb went in horizontally, from left to right and right to left and the light shone sideways and did no good as a stoplight. Money wasted. I have added some LED tail light to my camper, higher, above the factory ones because when I carry bikes they are covered and the factory lights are then covered also. But, if you don't need it, why spend the money? The factory lights are more than adequate.