The outfits are called Luces due to the effects of the light in the paillettes used to make the chaquetilla (jacket) and the taleguilla (pants). These two pieces which compound the outfit are made of gold, silver and silk. The gold outfits are worn by the most important bullfighters, while those made of silver are made for men who help the true bullfighter, who is going to face the bull by himself.
Here are some pics taken in Campo Pequeno, in Lisbon, the most well-known bullring in Portugal. I wish the quality was better, however I was not in a good place and my camera is not as great as I wanted it to be (I am waiting for another as a Christmas' gift). Enjoy!