There’s some (understandable) confusion going on here.
Santería is a syncretic religion of a mixture of Catholicism and a mixture of Yoruba Religion (one of many Traditional African Religions) practiced by the Yoruba people of the present-day Ghana, Benin, Togo, and Nigeria.
When slaves from such places were taken to the New World by Portuguese and Spanish traders, they were brought to the Caribbean, where subsequent coercive conversion made them Catholics. As in the case of most coercive conversions, the Africans “hid” their native religion behind a Catholic facade. Old Yoruba gods became Catholic Saints. Their name(s) and/or images were changes to match a Catholic analogue, some Catholic terminology was borrowed, and voila you have what
looks like Catholicism.
Santería is the modern evolution of such syncretism. It is not in any way part of genuine Catholicism. Santeros practice animal sacrifice, have female priestesses (iyalorichas), and sometimes use psychoactive drugs in divination. All of these practices are forbidden by Catholicism.
Given the syncretic nature of Santería it’s easy to get confused by a supposed genuine Catholic tradition and one of Santería since many of the externals are similar if not identical.
The Google search you provided shows (at least mostly)
Catholic votive candles. you can tell this by the names of legitimate Saints on them.
Here are examples of strictly Santería candles:
http://www.papajimsbotanica.com/images/SANTERIA CANDLES.jpg
Notice the African images and Lucumí (Yoruba liturgical language) names of their “Orichas” (“saints” or deities).
Nota bene: There are many religious supply stores in parts of the United States representing a large population of Santería practitioners, which call themselves “Catholic” bookstores, but serve both legitimate Catholic devotionals as well as those of Santería. Note the first candle in this picture (Santería) and the other two (Catholic) obviously taken at such a store:
http://0.static.wix.com/media/c09227f8331ece30c09c9e61cab42805.wix_mp_1024
Such stores usually refer to themselves as ‘botanicas’ as they also sell traditional herbal remedies.