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Explanation: In the context,I would interpret manantial (luminoso) as a 'light source'
This could be a spot light source. Check ref and see if it fits.
"The Lightningcure LC5 series of UV spot light sources provides an industry-best 3,000 hour average life cycle, as well as higher power and lower maintenance. The features of the Lightningcure LC5 series make it well suited for UV curing of medical supplies, optical parts, and fiber optics connectors, as well as for SMD bonding, HGA assembly, and sealing of liquid crystal and other electronic parts."